Updated codemirror to v4.12.

Did a lot of cleanup to limit the size of the plugin.
I kept the emmet plugin.

applications/admin/static/codemirror/mode/haml/test.js

@@ -1,5 +1,8 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
 (function() {
-  var mode = CodeMirror.getMode({tabSize: 4}, "haml");
+  var mode = CodeMirror.getMode({tabSize: 4, indentUnit: 2}, "haml");
   function MT(name) { test.mode(name, mode, Array.prototype.slice.call(arguments, 1)); }
 
   // Requires at least one media query
@@ -28,7 +31,7 @@
      "[tag %a]([variable title][operator =][string \"test\"]){[atom :title] [operator =>] [string \"test\"]}");
 
   MT("htmlCode",
-     "[tag <h1>]Title[tag </h1>]");
+     "[tag&bracket <][tag h1][tag&bracket >]Title[tag&bracket </][tag h1][tag&bracket >]");
 
   MT("rubyBlock",
      "[operator =][variable-2 @item]");
@@ -50,9 +53,9 @@
       "  [comment -# this is a comment]",
       "     [comment and this is a comment too]",
       "  Date/Time",
-      "  [operator -] [variable now] [operator =] [tag DateTime][operator .][variable now]",
+      "  [operator -] [variable now] [operator =] [tag DateTime][operator .][property now]",
       "  [tag %strong=] [variable now]",
-      "  [operator -] [keyword if] [variable now] [operator >] [tag DateTime][operator .][variable parse]([string \"December 31, 2006\"])",
+      "  [operator -] [keyword if] [variable now] [operator >] [tag DateTime][operator .][property parse]([string \"December 31, 2006\"])",
       "     [operator =][string \"Happy\"]",
       "     [operator =][string \"Belated\"]",
       "     [operator =][string \"Birthday\"]");