Add editor synchronization to Roadmap.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Remove a redundant style.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Move undo/redo from context menu to toolbar.

Since, updating these items on selectionAdded() was no longer possible,
we extend the changed() function to refresh our custom controls.
Prettify track labels with chevron, move toolbar out of Edit Track.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>