Bug 176571

Created attachment 320207 [details] [Canvas Recording] all-actions.json Summary: Unexpected RecordingAction tree outline scrolling behavior. Scroll position changes when using up/down keys to change the selection. Reduction 1: 1. Import attached recording 2. Scroll to the bottom of the tree 3. Click to select frame 63 4. Press down-arrow repeatedly to select the last frame Expected: Selected item changes, scroll position does not. Actual: Scroll position moves with the selected item. Reduction 2: 1. Import attached recording 2. Scroll to the bottom of the tree 3. Click to select the last frame 4. Press up-arrow repeatedly to select the first frame Expected: Selected item moves while scroll position remains fixed, until the selected item is at the top of the tree Actual: Scroll position moves while the selection appears to remain in place.