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/shell/shell.js

@@ -1,3 +1,16 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
 CodeMirror.defineMode('shell', function() {
 
   var words = {};
@@ -23,10 +36,15 @@ CodeMirror.defineMode('shell', function() {
     'touch vi vim wall wc wget who write yes zsh');
 
   function tokenBase(stream, state) {
+    if (stream.eatSpace()) return null;
 
     var sol = stream.sol();
     var ch = stream.next();
 
+    if (ch === '\\') {
+      stream.next();
+      return null;
+    }
     if (ch === '\'' || ch === '"' || ch === '`') {
       state.tokens.unshift(tokenString(ch));
       return tokenize(stream, state);
@@ -53,7 +71,7 @@ CodeMirror.defineMode('shell', function() {
     }
     if (/\d/.test(ch)) {
       stream.eatWhile(/\d/);
-      if(!/\w/.test(stream.peek())) {
+      if(stream.eol() || !/\w/.test(stream.peek())) {
         return 'number';
       }
     }
@@ -109,10 +127,13 @@ CodeMirror.defineMode('shell', function() {
   return {
     startState: function() {return {tokens:[]};},
     token: function(stream, state) {
-      if (stream.eatSpace()) return null;
       return tokenize(stream, state);
-    }
+    },
+    lineComment: '#',
+    fold: "brace"
   };
 });
 
 CodeMirror.defineMIME('text/x-sh', 'shell');
+
+});