Make user finder more pleasant.

src/components/user_finder/user_finder.js

@@ -1,20 +1,30 @@
 const UserFinder = {
   data: () => ({
     username: undefined,
-    hidden: true
+    hidden: true,
+    error: false,
+    loading: false
   }),
   methods: {
     findUser (username) {
+      this.loading = true
       this.$store.state.api.backendInteractor.externalProfile(username)
         .then((user) => {
+          this.loading = false
+          this.hidden = true
           if (!user.error) {
             this.$store.commit('addNewUsers', [user])
             this.$router.push({name: 'user-profile', params: {id: user.id}})
+          } else {
+            this.error = true
           }
         })
     },
     toggleHidden () {
       this.hidden = !this.hidden
+    },
+    dismissError () {
+      this.error = false
     }
   }
 }