Move extra network tab buttons into tree view;

html/extra-networks-tree-button.html

@@ -1,8 +1,10 @@
 <span data-filterable-item-text hidden>{search_terms}</span>
-<button class="tree-list-content {subclass}"
+<div class="tree-list-content {subclass}"
     expanded="false"
     type="button"
     onclick="extraNetworksTreeOnClick(event, '{tabname}', '{tab_id}');{onclick_extra}"
+    data-path="{data_path}"
+    data-hash="{data_hash}"
 >
     <span class='tree-list-item-action tree-list-item-action--leading'>
         {action_list_item_action_leading}
@@ -19,4 +21,4 @@
     <span class="tree-list-item-action tree-list-item-action--trailing">
         {action_list_item_action_trailing}
     </span>
-</button>
+</div>