Add back checkmark for selected grammar

src/app/grammar-view.coffee

@@ -22,9 +22,9 @@ class GrammarView extends SelectList
 
   itemForElement: (grammar) ->
     if grammar is @currentGrammar
-      grammarClass = 'current-grammar'
+      grammarClass = 'active-item'
     else
-      grammarClass = 'grammar'
+      grammarClass = 'inactive-item'
 
     $$ ->
       @li grammar.name, class: grammarClass

static/select-list.css

@@ -45,3 +45,18 @@
   color: white;
   text-shadow: 0 1px 0 #4E0000;
 }
+
+.select-list li.active-item:before {
+  font-family: 'Octicons Regular';
+  font-size: 14px;
+  width: 14px;
+  height: 14px;
+  margin-right: 5px;
+  -webkit-font-smoothing: antialiased;
+  color: #9d9d9d;
+  content: '\f03a';
+}
+
+.select-list li.inactive-item {
+  padding-left: 29px;
+}