* fix: region() functions work for entities, having model, which is instantiated multiple times in a scene
* warn on Map_RegionBrush with none selected
* fix: 'region set brush' is deleting ultimateselected only (is using one to get bounds)
* deselect components on any region() function: could be texturized or edited implicitly
* allow 'region set selection' in components mode
* Map_RegionXY: deselect anything (could leave stuff selected + invisible)
* Valve220: Project {axial, ortho, cam, from face} functions
* conversions between AP, BP and Valve220 brush types; conversions to Brush Primitives and Valve220 formats are lossless
* detect brush format and automatically convert to current one on map Import and Paste
* Valve220: fixed Reset function, implemented Rotate one
* Valve220: fix overwriting basis on brush clone/map import ( in Face( Face ) constructor )
* BP: fix: normalize shift values during import, arbitrary projections and face->fit
* Valve220: fix texture lock for scaling, fix for negative texdef.scale
* brush format is preference for [maptypes, brushtypes]: [mapq1, quake], [mapq2, quake2], [mapq3, quake3]:
preferences->Brush->Brush type: Axial projection, Brush primitives, Valve 220
* autodetect brush type on map opening
* brush face surfaceflags are optional on loading for flexibility
* 'Snap planes to integer grid' option is always off by default
misc...
* draggable renderable transform origin for translate, rotate & scale manipulators
click w/o move = reset
move is constraintable to axis with shift pressed
* highlight manipulators' renderables on mouse hover
* mouse_moved_epsilon system (0.5% of viewport size) for m1, tunnel selectors, manipulators (except freelook) to make them more fail-safe
misc...
* entity inspector, entity list->'autofocus on selection' buttons: also do FocusAllViews() on clicking them
* focus on preferences treeview on 2nd+ call to make text search to work
* fixed WindowPositionTracker globally: minus many particular hacks, plus correct wnds positioning in Floating viewports layout
* fixed ToggleShown functionality: shown/hidden wnds states are saved and loaded correctly in Floating viewports layout
* also save/load XY and Cam viewports visibility states
* new preferences->layout icons
* fix: stop chaseMouseMotion on mouse button release
misc...
* selection system: fixes of: selecting point behind point (not perfectly precise distance)
selecting occluded objects and faces via direct and indirect hits
* select models from back in 2d
