Video position slider jumps to part way through video

[Jonathan Stafford]

Operating Systems: Windows XP Home and Kubuntu 12.04
OpenLP Trunk 1970
Media Backend: vlc

Steps to Reproduce:
1. Create or open a Service file in OpenLP that has at least two consecutive video files without any special starting/finishing times specified (I have tested with .mp4 and .flv videos).
2. Present the first video and click the play button.
3. While the video is playing, drag the video position slider to a different place and then leave the video to finish playing.
4. Press the right arrow to advance to the next video in the service.
5. Click the play button - note that the video playback commences from part way through instead of the beginning of the video.

[Jonathan Corwin (j-corwin)]

This looks to be due to the slider bar now having keyboard focus, and the left/right keys are being intercepted by this and moving the slider left and right.

[Tim Bentley (trb143)]

If I play a video and pause it say 10 seconds in, and then go live on a completely different video it will start playing automatically from the 10 second point, rather than the beginning. (Note, if I stop the video, move the slider somewhere, and then click play it will ignore the position I requested and start at the beginning... but this is true in trunk, I think but if these two behaviours could be swapped that might be useful!)

Follow up note - to be fixed