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/static/contact.vue

@@ -22,10 +22,7 @@
             <br>
             {{ $t('reportCommunityIssues') }}
             &colon;&nbsp;
-            <a
-              href
-              @click.prevent="modForm()"
-            >{{ $t('contactForm') }}</a>
+            <a href="mailto:admin@habitica.com">admin&commat;habitica&period;com</a>
           </span>
           <br>
           {{ $t('subscriptionPaymentIssues') }}