Bugfix: Aplication crashes when removing Oscope.
Added unsafed change identification for new circuit.
Editor: Added shortcut hints.
Circuit: Shortcut hints shows in main and context menu.
Circuit changes identificates with * in window title.
BugFix: Circuit shortcuts.
Editor: active Ctrl-N, Ctrl-S, Ctrl-Shift-S, Ctrl-O.
Circuit: Active Ctrl-S, Ctrl-Shift-S, Ctrl-N, Ctrl-O.
Move circuit actions to circuitwidget: arduino simulation.
Move circuit actions to circuitwidget.
