* Screen level regions created for menus are now a separate
CTX_wm_menu in the context, so they don't interfere with
existing regions.
* Fix context in popup menus to always come from the area
and region the popup was opened from.
* Removed some unused context stuff: tasks and reports.
The places that were using context reports were using it
wrong anyway.
* Fix F6 closing immediately after editing a button, by
making uiBlockSetFlag not clear existing flags anymore.
* Don't use ":" in boolean X/Y/Z buttons.