Draggable position line in citizen science pages

[peichins]

Using the native audio player ui is a little ugly and confusing when we show the position line on the spectrogram. This is because the playback head of the player doesn't quite line up with the position line (because the player track is shorter than the spectrogram).

The first step in replacing the native audio player is to make the position line draggable to allow the user to change the audio playback position by dragging the position line rather than the playback head in the native player.