Using search leads to inconsistent pointer state

[martinleopold]

Tested with branch master (f40361e)

A pointer should only be shown when the playhead is between start and end time of the annotation.

To reproduce:

• Reset to sample project
• In the inspector add a pointer to the very first annotation ('MGM Title Card')
• Yellow pointer appears on top of the video
• Type credits into the search field
• The inspector is filtered and shows only one annotation Credits
• Double click the annotation in the inspector
• Correct: The annotation is selected and the playhead jumps to the starting time
• Incorrect: The pointer for 'MGM Title Card' is still shown on top of the video.