This removes features that were not selected for 3.3.
* Removes breadcrumb
* Removes "Jump To" panel and some of the hotkey panel items
* Removes Buttons in favor of Action Dropdown
* Removes chevrons
* Removes ActionIcon model
* Removes the Rename button on the context menu
* Makes details panel readonly
* Adds expand modal for extra vars
* Adds inventory copy function back to inventory list
* Sets cursor to visible
* Adds hide_menus
* Adds fix for mice that return large mousewheel deltas