Move circuit actions to circuitwidget.
BugFix: Simulation stops after undo, redo.
Switches: adjust impedances.
BugFix: Wave Generator: Saw Wave wrong freq.
BugFix: Editor: breakpoint menu should not show in Editor Mode
BugFix: Editor doesn't let set compiler path for new file.
BugFix: Editor not activating all actions afther new file.
New Relay: Added properties for num. poles and ST/DT.
BugFix: Cicuit: still some bugs afther last changes.
