Show the toolbar as soon as the target has been activated
Still to load at this point are
- Additional modules (first load only)
- Parsoid HTML
To account for this we disable the toolFactory event listeners
to prevent flickering, and create a hidden blank dummy surface to
attach the toolbar to.
Bug: T76523
Change-Id: Iab24858f23f4db944dcaa6683a82b950ea9ee1b1