Keyboard shortcuts should be based on OS

[GoogleCodeExporter]

What steps will reproduce the problem?
1. In MacOS, ctrl+c is used for copy. 


What is the expected output? What do you see instead?
Ideally it should be command+c for Mac


What version of the product are you using? On what operating system?
Mac OS, KawigiEdit 2.1.8


Please provide any additional information below.

* A possible solution is to use java.awt.Toolkit class and using 
getMenuShortcutKeyMask method. instead of hardcoded KeyEvent and InputEvent 
constants. A good amount of refactoring may be required.

Original issue reported on code.google.com by [email protected] on 27 Jul 2013 at 8:17