When manipulating the seekbar while playback is paused or stopped, the seek pointer returns to the position it was at before the manipulation and only updates its position after playback is started

[Nocifer]

Describe the bug
As per title.

To Reproduce
Steps to reproduce the behavior:

1. Load something in the playlist
2. Click or drag the seek pointer somewhere on the seekbar
3. Observe how the seek pointer returns to its previous position
4. Begin playback
5. The seek pointer jumps to the point you clicked/dragged it in step 3 and playback begins at that point as expected

Expected behavior
The seek pointer should update its position instantly and not wait for playback to begin.

[jeffvli]

I'm aware of this bug, but haven't had a chance to properly diagnose it. It's actually related to why I deactivated the stop button when playback is paused in #273. Once this is fixed I should be able to do the other one as well.