Add Space-Key as PlayPause-Key

[screeny05]

This PR adds the spacebar as a key to toggle playback in the videoplayer.

Changes
Add additional key-shortcut in videoplayer

[dmitrylyzo]

In TV layout, Space triggers focused buttons.
It could be ignored here

jellyfin-web/src/controllers/playback/videoosd.js

Line 1107 in 3c49f10

if (layoutManager.tv && keyboardnavigation.isNavigationKey(key)) {

At current moment, Space is handled when OSD is hidden.

jellyfin-web/src/controllers/playback/videoosd.js

Line 1101 in 3c49f10

if (!currentVisibleMenu && 32 === e.keyCode) {

[dmitrylyzo]

Just tested this PR changes on master (Desktop/TV):

• When OSD is visible, focus is on button Play/Pause, and we get playPause + click on button Play/Pause (playPause again). So this does not work as expected.
• The only way to make it work is to first click on videoplayer. In this case, focus will be on player instead of button.

[dkanada]

@screeny05 did you have plans to fix the issues mentioned earlier?

[dkanada]

I'm closing this for now from lack of movement, but I agree there are some inconsistencies that need to be resolved with the space key. Feel free to open this back up again if you plan to fix the compatibility issues mentioned above!