Fix clone dropdown parent inheritance issues in HAML

The change in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24015
caused some parent relationships to be incorrect. This caused a failure
in the EE failure the Geo button was added because the modal stopped
showing.

app/views/projects/buttons/_clone.html.haml

@@ -5,7 +5,7 @@
     %span.append-right-4.js-clone-dropdown-label
       = _('Clone')
     = sprite_icon("arrow-down", css_class: "icon")
-  %form.p-3.dropdown-menu.dropdown-menu-right.dropdown-menu-large.dropdown-menu-selectable.clone-options-dropdown.qa-clone-options
+  %ul.p-3.dropdown-menu.dropdown-menu-right.dropdown-menu-large.dropdown-menu-selectable.clone-options-dropdown.qa-clone-options
     - if ssh_enabled?
       %li.pb-2
         %label.label-bold