Read-only file dialog: Use VCS terms if applicable

Also add keyboard accelerators

Change-Id: Icea8af6af7e5d94623ba7782c375977bbab17f22
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/coreplugin/iversioncontrol.h

@@ -163,6 +163,16 @@ public:
      */
     virtual bool vcsAnnotate(const QString &file, int line) = 0;
 
+    /*!
+     * Display text for Open operation
+     */
+    virtual QString vcsOpenText() const;
+
+    /*!
+     * Display text for Make Writable
+     */
+    virtual QString vcsMakeWritableText() const;
+
 signals:
     void repositoryChanged(const QString &repository);
     void filesChanged(const QStringList &files);