Adding back shortcut and avoid double assign

Author: mach0

src/ui/qgisapp.ui

@@ -26,7 +26,7 @@
     </property>
     <widget class="QMenu" name="mRecentProjectsMenu">
      <property name="title">
-      <string>Open Recent</string>
+      <string>Open &amp;Recent</string>
      </property>
     </widget>
     <widget class="QMenu" name="mPrintComposersMenu">