Hotkey for comment toggling in KeyboardManager
Ignore Ctrl+Shift+C in RoboScintilla::keyPressEvent()
Public methods for managing value of ScriptWidget::_disableTextAndCursorNotifications
Ctrl+Shift+C shortcut toggle comments in the shell
#467
Saving previous view modes in private field of OutputWidget
#509
Fixes #408
 - use standard "New" shortcuts to open new connections
 - use standard "Open" shortcuts to open .js files
 - update shortcuts.txt with current shortcuts
Merge pull request #560 from stennie/issue-408

Fixes #408
Fixes #519: Full screen mode not working on OS X
 - changed fullscreen shortcut to Cmd/Ctrl+F11
Merge pull request #563 from stennie/issue-519

Fixes #519: Full screen mode not working on OS X
Fixes #449
 - Line numbers in JSON views can be toggled with Ctrl+F11 on OS X
Merge pull request #565 from stennie/issue-449

Fixes #449: Add line numbers to JSON editing window (OS X)
Unnecessary typecast removed
#467
Merge pull request #555 from VBelozyorov/issue-467

Comment / uncomment selected code in the shell
Merge pull request #556 from VBelozyorov/issue-509

Saving previous view modes in private field of OutputWidget
Fix #564
 - User preference to have line numbers displayed in editor by default
Merge pull request #567 from stennie/issue-564

Fix #564: Add user preference to have line numbers displayed in editor by default
Grammar correction: s/is no results/are no results/
Remove obsolete instructions
Fix #544: Space after document causes validation error
 - error messages for JSON validation could still be greatly improved
Merge pull request #568 from stennie/issue-544

Fix #544: Space after document causes validation error