minor bugfix regarding hierarchy tree values + made edge edtion automatic if adjacent to a breakpoint and the other adjacent one if edited
made breakpoints deleted if adjacent edge is
+ refactoring of naming/renaming protocol :
	- when created, a tactic has a unique name (appending an index at the end of the name if necessary)
	- when edited, if the given name is already taken, then we append an index at the end of it to make it unique
	- every name of tactic is then unique
	- this protocol will change when a final one will be figure out
	- node and textfield are always updated according to this protocol