Description:
When advancing/rewinding a presentation using keys, sometimes animations are skipped and the presentation advances to the next slide unexpectedly.  Backing up from one  slide to the previous  one unexpectedly rewinds some animations on the previous slide.

Steps to Reproduce:
1. Create a new Impress document.  Don't select a template, just cancel the template dialogue so you have a blank presentation.
2. Edit the title, and text on slide 1, then insert two or more objects (textboxes, images, doesn't seem to matter what).  Add animations to these two objects to make them appear, each on their own click.
3. Create a second slide.
4. Start the presentation at the beginning.  Advance through the presentation using right arrow.  Everything should behave as expected.
5. Go back to the beginning of the slide show (e.g. left arrow until you are at the start).  Right arrow  once to run the  first animation.  Left arrow once to undo it.  Now  right arrow twice.  It will run the first animation, but then will skip the second animation and advance to the second slide.
6. Try right and left arrow in various sequences.  This should cause some unexpected behaviour such as running two animations on one click, or backing up from slide 2 to slide 1 but with not all the animations on slide 1  in their final states.

Actual Results:
Right and left click inconsistently advance and back up, sometime launching  or undoing  more than one event.

Expected Results:
Right arrow should always advance  one animation.  If all the animations on a page have run then right arrow should advance to next slide.  Left arrow should always back up one animation.  If the presentation  is on slide 2 (with no animations on that slide) then left click should back the presentation up to slide 1 with all animations there having already run ("final state" of the slide).


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Keywords: UI, Presentation, Impress