refactor animal avatar font-size to automatically scale with parents

customize.dist/src/less2/include/avatar.less

@@ -40,7 +40,13 @@
             color: @cp_avatar-fg;
             font-size: @avatar-font-size;
             font-size: var(--avatar-font-size);
-            text-transform: capitalize;
+            .animal {
+                font-size: 20px;
+                // scale animal avatar to be somewhat larger, because:
+                // 1. emojis are wider than most latin characters
+                // 2. they should occupy the width of two average characters
+                font-size: calc(var(--avatar-width) * (6/5));
+            }
         }
         media-tag {
             min-height: @avatar-width;

customize.dist/src/less2/include/toolbar.less

@@ -200,9 +200,6 @@
                 .avatar_main(30px);
                 .cp-avatar-default, media-tag {
                     margin-right: 5px;
-                    &.animal {
-                        font-size: 20px;
-                    }
                 }
                 &.cp-userlist-clickable {
                     cursor: pointer;