add closing icon and action to hook error

app/components/hooks-list-item.coffee

@@ -8,4 +8,7 @@ HooksListItemComponent = Ember.Component.extend
     handleToggleError: ->
       @set("errorMessage", "There was an error")
 
+    close: ->
+      @set("errorMessage", null)
+
 `export default HooksListItemComponent`

app/styles/app/layouts/profile.sass

@@ -213,3 +213,9 @@ p.profile-user-last
       height: 1.2em
       background: #f1b6ad
       transform: rotate(45deg)
+  .close
+    @extend .icon
+    position: absolute
+    top: 1em
+    right: 1em
+    @extend .icon--dismiss-red

app/templates/components/hooks-list-item.hbs

@@ -13,6 +13,8 @@
 
 {{#if errorMessage}}
   <div class="error">
-    <p>{{errorMessage}}</p>
+    <p>
+      {{errorMessage}}
+      <a class="close" {{action "close" target=view}}></a></p>
   </div>
 {{/if}}