remove links to Moderator Contact Form

This is a temporary measure until we can get the form working again.

This has NOT been approved by any of Habitica's staff.
It's just being proposed for consideration.

The changes are:

- remove link from Help menu
- replace link in Contacts page with mailto admin@habitica.com without changing the visible text of the link
- replace link in Tavern sidebar with mailto admin@habitica.com using the visible text from the Contacts page

website/client/src/components/groups/tavern.vue

@@ -307,10 +307,9 @@
         <sidebar-section :title="$t('helpfulLinks')">
           <ul>
             <li>
-              <a
-                href
-                @click.prevent="modForm()"
-              >{{ $t('contactForm') }}</a>
+              <a href="mailto:admin@habitica.com">
+                {{ $t('reportCommunityIssues') }}
+              </a>
             </li>
             <li>
               <router-link