refactor CodeMirror library instantiation

shared/naturalcrit/codeEditor/code-mirror.js

@@ -0,0 +1,36 @@
+let CodeMirror;
+if(typeof navigator !== 'undefined'){
+	CodeMirror = require('codemirror');
+
+	//Language Modes
+	require('codemirror/mode/gfm/gfm.js'); //Github flavoured markdown
+	require('codemirror/mode/css/css.js');
+	require('codemirror/mode/javascript/javascript.js');
+
+	//Addons
+	//Code folding
+	require('codemirror/addon/fold/foldcode.js');
+	require('codemirror/addon/fold/foldgutter.js');
+	//Search and replace
+	require('codemirror/addon/search/search.js');
+	require('codemirror/addon/search/searchcursor.js');
+	require('codemirror/addon/search/jump-to-line.js');
+	require('codemirror/addon/search/match-highlighter.js');
+	require('codemirror/addon/search/matchesonscrollbar.js');
+	require('codemirror/addon/dialog/dialog.js');
+	//Trailing space highlighting
+	// require('codemirror/addon/edit/trailingspace.js');
+	//Active line highlighting
+	// require('codemirror/addon/selection/active-line.js');
+	//Scroll past last line
+	require('codemirror/addon/scroll/scrollpastend.js');
+	//Auto-closing
+	//XML code folding is a requirement of the auto-closing tag feature and is not enabled
+	require('codemirror/addon/fold/xml-fold.js');
+	require('codemirror/addon/edit/closetag.js');
+
+	const foldCode = require('./helpers/fold-code');
+	foldCode.registerHomebreweryHelper(CodeMirror);
+}
+
+module.exports = CodeMirror;