Fixed width usercards in follow lists.

src/components/user_card/user_card.vue

@@ -59,9 +59,7 @@
   }
 
   .usercard {
-    width: -webkit-fill-available;
-    width: -moz-webkit-fill-available;
-    stretch: fill;
+    width: fill-available;
     margin: 0.2em 0 0.7em 0;
     border-radius: 10px;
     border-style: solid;