Set alias to stylus mode inof

Author: Rokt33r

browser/lib/customMeta.js

@@ -1,5 +1,10 @@
 import CodeMirror from 'codemirror'
 import 'codemirror-mode-elixir'
 
-CodeMirror.modeInfo.push({name: 'Stylus', mime: 'text/x-styl', mode: 'stylus', ext: ['styl'], alias: ['styl']})
+const stylusCodeInfo = CodeMirror.modeInfo.find(info => info.name === 'Stylus')
+if (stylusCodeInfo == null) {
+  CodeMirror.modeInfo.push({name: 'Stylus', mime: 'text/x-styl', mode: 'stylus', ext: ['styl'], alias: ['styl']})
+} else {
+  stylusCodeInfo.alias = ['styl']
+}
 CodeMirror.modeInfo.push({name: 'Elixir', mime: 'text/x-elixir', mode: 'elixir', ext: ['ex']})