Fix some menu entry labels: missing ended dots, missing shortcut
Fix some menu entry labels: missing ended dots, missing shortcut

Menu entries that involved a dialog or modal window to be completed should be
shown with '...' ending dots (ie. 'Open NC File...', 'Save NC File as...');

"Machining" does now have a shortcut (default C language: alt+'m');

Some more code indent.


asmuelle/heekscnc,satovey/heekscnc,asmuelle/heekscnc,satovey/heekscnc,asmuelle/heekscnc,jihyun-kim/heekscnc,jihyun-kim/heekscnc,asmuelle/heekscnc,jihyun-kim/heekscnc,jihyun-kim/heekscnc,satovey/heekscnc,satovey/heekscnc