[Glitch] Change about page to be mounted in the web UI

Port 1bd00036c2 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/components/index.scss

@@ -1034,6 +1034,7 @@
     padding: 10px;
     padding-top: 20px;
     z-index: 1;
+    font-size: 13px;
 
     ul {
       margin-bottom: 10px;
@@ -1045,7 +1046,6 @@
 
     p {
       color: $dark-text-color;
-      font-size: 13px;
       margin-bottom: 20px;
 
       a {
@@ -1779,3 +1779,4 @@ noscript {
 @import 'explore';
 @import 'signed_out';
 @import 'privacy_policy';
+@import 'about';