Switch to in-page dialogue boxes

[Shrinks99]

Currently we use native browser dialogues however these can be hidden by users to prevent spammy webpages from locking people out of their browsers. Unfortunately this also means that our users can disable them from appearing as most (all?) browsers have options to disable them for the tab. This means that the "Accept" options which are required to continue in the case of deleting crawls can be disabled until users close and reopen a new tab which isn't great!

For cancelling & stopping crawls would be neat to also show the notes and encourage users to note down a reason for cancelling their crawls to keep users in sync.

Caveats

In-page dialogues should probably not be used where we need to prevent users from closing the page, eg: preventing users from leaving an upload currently in progress if they try to close the page specifically. By only using them where absolutely needed we should also lower the chance they see the "hide additional dialogues" option! :)

ToDo

• Implement in-page dialogue for stopping crawls #832
• Add the crawl notes editor to the cancel / stop workflow dialogue box. #807
• Switch to in-page dialogue boxes for cancelling & stopping crawls from the workflows list page
• Move to in-page dialogue boxes throughout rest of application (to assess)