[Glitch] Improve display of lock icon in account headers

Port 30b193b856 to glitch-soc

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

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

@@ -621,6 +621,13 @@
           span {
             user-select: all;
           }
+
+          .icon-lock {
+            height: 16px;
+            width: 16px;
+            position: relative;
+            top: 3px;
+          }
         }
       }
     }