* moved header into a component

with shouldComponentUopdate false to avoid unecessary re-renders - test

* moved Header component into separate file

+removed unused styling, commented out for now in case it's needed, eg in mobile view?

* moved playback_rates const into separate file

* optimised re-render of playback rate

* optimise re-render for VideoPlayer

* added some notes - draft

on how to prevent uncessary re-renders in React

* Added some comments

* small note in docs

about using console.log in render to measure performance

* ammend to notes

* Update 2019-05-16-prevent-unnecessary-re-renders-in-react.md

* notes update

* notes fix

* trying out why-did-you-update

* updated MediaPlayer and subcomponents

* made ToolTip 'how does this work' into it's own component

* updated Demo app to reduce unecessary re-renders

* added react-visibility-sensor

* refactor settings

* removed unecessary attributes from state of components + WrapperBlock performance tweak using react-visibility-sensor

* Added timestamp update via diff tool

* Added missing function

* Commited intermediate state

* Rewrote timestamp alignment and differ to be integrated in each other instead of doing a 2-step process.

* Update Timestamps now works correctly.

* Fixed errors from rebase, removed debug code

* Moved UpdateTimestamp into its own folder.

* added updateTimestampsSSTAlign which updates the timestamps with the sst-align code

* Added documentation

* Merged timer for updating the timestamps and local save.

* Selection state is now kept across updates to timestamps

* Fixed bug where words with punctuation always are considered as new words. Timestamp update function now also uses the alignWords function directly instead of alignJSONText, removing some overhead.

* Fixed small bug which raised an error if an empty block was present during timestamp update

* Changed time of timestamp-update. Now re-calculates the timestamps after 5 seconds if the transcript has been edited or if the user saves the transcript manually with the save button

* Code cleanup

* Added timestamp update via diff tool

* Added missing function

* Commited intermediate state

* Rewrote timestamp alignment and differ to be integrated in each other instead of doing a 2-step process.

* Update Timestamps now works correctly.

* Fixed errors from rebase, removed debug code

* Moved UpdateTimestamp into its own folder.

* added updateTimestampsSSTAlign which updates the timestamps with the sst-align code

* Added timestamp update via diff tool

* Added missing function

* Commited intermediate state

* Rewrote timestamp alignment and differ to be integrated in each other instead of doing a 2-step process.

* Update Timestamps now works correctly.

* Fixed errors from rebase, removed debug code

* Moved UpdateTimestamp into its own folder.

* added updateTimestampsSSTAlign which updates the timestamps with the sst-align code

* Added documentation

* Merged timer for updating the timestamps and local save.

* Selection state is now kept across updates to timestamps

* Fixed bug where words with punctuation always are considered as new words. Timestamp update function now also uses the alignWords function directly instead of alignJSONText, removing some overhead.

* Fixed small bug which raised an error if an empty block was present during timestamp update

* Changed time of timestamp-update. Now re-calculates the timestamps after 5 seconds if the transcript has been edited or if the user saves the transcript manually with the save button

* Code cleanup

* some changes to show sudgestions for PR

* added some of changes sudgested in PR

* Update package.json

…174)

* Added timestamp update via diff tool

* Added missing function

* Commited intermediate state

* Rewrote timestamp alignment and differ to be integrated in each other instead of doing a 2-step process.

* Update Timestamps now works correctly.

* Fixed errors from rebase, removed debug code

* Moved UpdateTimestamp into its own folder.

* added updateTimestampsSSTAlign which updates the timestamps with the sst-align code

* Added timestamp update via diff tool

* Added missing function

* Commited intermediate state

* Rewrote timestamp alignment and differ to be integrated in each other instead of doing a 2-step process.

* Update Timestamps now works correctly.

* Fixed errors from rebase, removed debug code

* Moved UpdateTimestamp into its own folder.

* added updateTimestampsSSTAlign which updates the timestamps with the sst-align code

* Added documentation

* Merged timer for updating the timestamps and local save.

* Selection state is now kept across updates to timestamps

* Fixed bug where words with punctuation always are considered as new words. Timestamp update function now also uses the alignWords function directly instead of alignJSONText, removing some overhead.

* Fixed small bug which raised an error if an empty block was present during timestamp update

* Changed time of timestamp-update. Now re-calculates the timestamps after 5 seconds if the transcript has been edited or if the user saves the transcript manually with the save button

* Code cleanup

* some changes to show sudgestions for PR

* added some of changes sudgested in PR

* adjusted DPE adapter

so that it preserves paragraphs break within contiguos speakers

* fixed one test

* commented out auto align

left aligning as a step before save btn and before export function, rather then as a step that happens everytime autosave is triggered, as that might be unecessary, and add performance overhead, I also noticed the cursor position jumped after realignement, thought something was been put in place to preserve/avoid that?

unselectabel speakers and timecodes

* added option to export srt files

and layout to export other type of captions with auto segmentation of lines

* added support for other subtitles formats

added sample files for adding tests for subtitle composer module at later stage

for export download options

algo was picking the wrong words from the list

after interpolation words time boundares  where overlapping

and playback rate not working

fix #180

changes from James review #160

* Refactor should component updatre for transcript editor

* Refactor should component updatre for PlayerControls

* Refactor should component updatre for TimeBox

* Refactor should component update for ProgressBar

* Refactor should component update for TimedTextEditor

* Refactor should component update for Header

Fixed from James comments from #144 (review)

… develop