Move Open Folder... to 'File' menu

Signed-off-by: Waqar Ahmed <waqar.17a@gmail.com>

addons/project/ui.rc

@@ -2,9 +2,11 @@
 <!DOCTYPE gui SYSTEM "kpartgui.dtd">
 <gui name="kateprojectplugin" library="kateprojectplugin" version="10" translationDomain="kateproject">
   <MenuBar>
+  <Menu name="file">
+    <Action name="projects_open_project" group="open_merge"/>
+  </Menu>
     <Menu name="projects">
       <text>&amp;Projects</text>
-      <Action name="projects_open_project"/>
       <Action name="projects_prev_project"/>
       <Action name="projects_next_project"/>
       <Action name="projects_goto_index" />