[Simple Timeline] Scrollbar always comes back to beginning
@bilboed
Submitted by Edward Hervey Assigned to Edward Hervey @bilboed
Description
When doing the following actions, the scrollbar/timeline always comes back to the beginning:
- dropping a source
- changing source positions
- removing a source
- coming back from editing a source
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=461737