QmlJSScriptConsole: Refactored ScriptConsole, added functionality.

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>

src/plugins/debugger/qml/qmlengine.cpp

@@ -676,7 +676,7 @@ void QmlEngine::requestModuleSymbols(const QString &moduleName)
 bool QmlEngine::setToolTipExpression(const QPoint &mousePos,
     TextEditor::ITextEditor *editor, const DebuggerToolTipContext &ctx)
 {
-    // This is processed by QML inspector, which has dependencies to 
+    // This is processed by QML inspector, which has dependencies to
     // the qml js editor. Makes life easier.
     emit tooltipRequested(mousePos, editor, ctx.position);
     return true;
@@ -811,6 +811,11 @@ void QmlEngine::logMessage(LogDirection direction, const QString &message)
     showMessage(msg, LogDebug);
 }
 
+QmlAdapter *QmlEngine::adapter() const
+{
+    return &d->m_adapter;
+}
+
 QmlEngine *createQmlEngine(const DebuggerStartParameters &sp,
     DebuggerEngine *masterEngine)
 {