CppEditor: Jump directly to single virtual function

Assumption: model never has 1 entry for immediate result
(there is always the natural result + "Searching for overrides"

Change-Id: I5de7e7933b1309f995a6111a2ab1c7aed31c086e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/plugins/texteditor/codeassist/genericproposalwidget.h

@@ -37,6 +37,7 @@
 namespace TextEditor {
 
 class GenericProposalWidgetPrivate;
+class IGenericProposalModel;
 
 class TEXTEDITOR_EXPORT GenericProposalWidget : public IAssistProposalWidget
 {
@@ -72,6 +73,7 @@ private slots:
 protected:
     bool eventFilter(QObject *o, QEvent *e);
     bool activateCurrentProposalItem();
+    IGenericProposalModel *model();
 
 private:
     GenericProposalWidgetPrivate *d;