Improve transcribing process in UI

[leihelondon]

Context:
As part of #221, @nganthi has improved the transcribing process. See design here (relates to Transcripts section only).

This ticket is to implement the following features:

• Add green tick icon next to available transcripts (check font awesome for a good match)
• Show the "uploading progress bar" and offers the ability to cancel the upload. (Also remove the react-fetch-progressbar dependency as no longer in use) [cancelling moved to Add cancel upload and cancel transcription options to project view #248]
• Show the approximate transcribing time (use media duration for now - Add estimated time to transcribe #240 covers estimation) and offers the ability to cancel the transcribing process [cancelling moved to Add cancel upload and cancel transcription options to project view #248]
• Show the "queued" status if the media is queued by PSTT
• Show the error message if upload or transcribing fails and offers the ability to re-upload or re-transcribe [moved to Implement reupload functionality for failed and expired media #244]
• Show file deleted message if media has expired (see Expire media content over 60 days old #195)

Developers' notes:

• For icons, continue using the Font Awesome library (audio, video, cancel, retry, alert icons)

Out of scope:

• Notify the users when their transcription is ready.
• Changing the font