message: add file menu shortcuts into lumina-fm
diff: </property>
  <widget class="QMenu" name="menuFile">
  <property name="title">
  - <string>File</string>
  + <string>&amp;File</string>
  </property>
  <addaction name="actionNew_Window"/>
  <addaction name="actionNew_Tab"/>
  </widget>
  <widget class="QMenu" name="menuView">
  <property name="title">
  - <string>View</string>
  + <string>&amp;View</string>
  </property>
  <widget class="QMenu" name="menuView_Mode">
  <property name="title">
  </widget>
  <widget class="QMenu" name="menuBookmarks">
  <property name="title">
  - <string>Bookmarks</string>
  + <string>&amp;Bookmarks</string>
  </property>
  <addaction name="actionManage_Bookmarks"/>
  <addaction name="actionAdd_Bookmark"/>
  </widget>
  <widget class="QMenu" name="menuExternal_Devices">
  <property name="title">
  - <string>External Devices</string>
  + <string>&amp;External Devices</string>
  </property>
  <addaction name="actionScan"/>
  <addaction name="separator"/>
  </widget>
  <widget class="QMenu" name="menuGit">
  <property name="title">
  - <string>Git</string>
  + <string>&amp;Git</string>
  </property>
  <addaction name="actionRepo_Status"/>
  <addaction name="actionClone_Repository"/>
  