allow to select and move child elements
renamed shapesUngroup.html -> shapesCompartment.html
use new CompartmentSelectionPolicy && reset SingleSe...
added the ability to drag children in other shapes and place 'em there
fix-only Canvas.js->getBestFigure (removed comments, logs)
implemented Figure.js->onDragLeave (this needs to go in a generated class)
Merge branch 'ungroupTests'