Added some shortcuts

 - menu shortcuts
 - action shortcuts (Close: Ctrl+W, Close: Ctrl+Q, Export: Ctrl+Shift+S)
Merge branch 'code-refactoring-trans-fr' into code-refactoring-more-shortcuts
Added fr_FR shortcut translations
Merge pull request #77 from babs/code-refactoring-more-shortcuts

French translation updates and new shortcuts addition