Combine new javascript Flash methods into one

app/assets/javascripts/flash.js.coffee

@@ -12,8 +12,5 @@ class @Flash
     @flash.click -> $(@).fadeOut()
     @flash.show()
 
-  pinToTop: ->
-    @flash.addClass('flash-pinned')
-
-  raise: ->
-    @flash.addClass('flash-raised')
+  pin: ->
+    @flash.addClass('flash-pinned flash-raised')

app/assets/javascripts/notes.js.coffee

@@ -114,8 +114,7 @@ class @Notes
     unless note.valid
       if note.award
         flash = new Flash('You have already used this award emoji !', 'alert')
-        flash.pinToTop()
-        flash.raise()
+        flash.pin()
       return
 
     # render note if it not present in loaded list