user avatar cleanup

src/components/user_avatar/user_avatar.js

@@ -14,12 +14,31 @@ library.add(
 )
 
 const UserAvatar = {
-  props: [
-    'user',
-    'compact',
-    'showActorTypeIndicator',
-    'url'
-  ],
+  props: {
+    // User object to show avatar of
+    user: {
+      required: true,
+      type: Object
+    },
+    // Use less space and use alternative roundness
+    compact: {
+      required: false,
+      type: Boolean,
+      default: false
+    },
+    // Show small icon indicating if account is a bot or group
+    showActorTypeIndicator : {
+      required: false,
+      type: Boolean,
+      default: false
+    },
+    // Override avatar image URL, useful for profile editing
+    url: {
+      required: false,
+      type: String,
+      default: null
+    }
+  },
   data () {
     return {
       showPlaceholder: false,