Upgrade to open-on-github@0.29.0
Upgrade command-palette with better description
Allow successive accented characters to be inserted in React editor

Refs #2732

Because we're only checking the length of the input element's selection
in the React editor on textinput events and not also its content, we
were mistaking some IME compositions as accented character menu
insertions. Clearing the content of the input on 'compositionend'
prevents this issue.
Use setImmediate to batch all editor updates, even in animation frames

When I was using nextTick to batch updates, there were issues with
flicker. So I was attempting to always update synchronously in animation
frames, which was complicated. setImmediate doesn't cause the flicker
however, so I'm able to remove the special logic for sync updates in
animation frames and just use it across the board.