Avoid all scenarios where sliders can become zero length
Add border showing selected blueprints in timeline
Apply changes resulting from IBindable interface updates
Fix div-by-zero when scaling a 1-dimensional slider
Attempt to fix match subscreen test failure
Further refactor FrameReplayInputHandler, simplify the template code
Fix an occasional crash when deleting a HitObject via internal means
Fix placement blueprints not being correctly removed after a rolled back placement
Fix slider not displaying in timeline during zero-duration placement
StartFrame
EndFrame
Now it is supported in framework
SliderPlacementState
Fix timeline seeking to an incorrect initial location
This isn't required but makes the initial appearance animation nicer.