fix: Chat dropdown menu do not open if user is not administrator - EX…

…O-70319

Before this fix, all dropdown menu does not opens in chat page
This is because the js module bts_dropdown is not loaded on this page when I am administrators
It was loaded before wy other js module, which were recently cleaned.

This commit add module bts_dropdown as dependency of chat module

application/src/main/webapp/WEB-INF/gatein-resources.xml

@@ -95,6 +95,9 @@
         <depends>
             <module>bts_tooltip</module>
         </depends>
+        <depends>
+            <module>bts_dropdown</module>
+        </depends>
         <depends>
             <module>fetchPolyfill</module>
         </depends>