Modifies click/select behaviour - work in progress! Also some refactoring
Keep cursor in place when selecting and moving items
Now multiple population moves will undo
Code tidying in advance of fixing an issue with bezier curve handle moving
Get rid of warnings, as well as unused code (versioning, nineml_al_objec)
Allow multiple moves to undo in one step. Also, decapitalise undocommands
No need to check return value of disconnect, but DO need to actually call the method
Corrected my broken projection/input handle selection behaviour