* Started rewriting
* Making progress
* Fix resizers not moving around
* Implemented splitting, fixed some bugs
* Removed more code, renamed methods
* Merging zones works
* Fix Shift key behavior
* Added spacing (has bugs)
* Implement minimum size restriction
* Match preview and editor visuals
* Snapping works
* Show when splitting is not possible
* Fix spell checker complaining
* Tweak FZ Lib function computing grid zones
* Fix potential crash when loading old zone layouts
* Fix dead objects talking
* Fix splitters being shown when they shouldn't be
* Fix index numbering
* Fix small glitch with the shift key
* Do not snap to borders outside the zone
