The ScriptConsole is renamed to QmlJSScriptConsole. The console can be used
to evaluate expressions during a QML application debug session.
Changes:
* Console can be used even when application is not on a debug break
* The object context is the currently selected object in Inspector
* ContextMenu has a Clear option
* Multiple line expressions are supported
* Traverse Command History using up and down arrow keys

Change-Id: I4e1cd8763d60be43dbba395ead2a9a086d6bab7d
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>