When audio is playing, resetting transcription location doesn't consistently stay where you want it

[johnwdubois]

Resetting the transcription location to the start doesn't consistently reset the location of the audio playback to the start.

To reproduce

1. Check the box for "Click to play audio".
2. Drag the audio slider to about one minute.
3. Click on a line to play from there.
4. Press pause.
5. Press play, See text scroll.
6. Press pause.
7. Click to play.
8. Press CTRL-UP arrow to jump the text to the first line of the transcription.
9. See how the text keeps jumping back to where the audio is playing.

Fix

1. Add buttons:

• Double black triangle pointing left: Jump to first unit (audio and transcription)
• Double black triangle pointing right: Jump to last unit (audio and transcription)
• "Sync text to audio"

2. Add button for "Go to time" function:

• input box for time value (number input only)