Add dark theme

frontend/src/components/files/Editor.vue

@@ -10,6 +10,7 @@ import buttons from '@/utils/buttons'
 import ace from 'ace-builds/src-min-noconflict/ace.js'
 import modelist from 'ace-builds/src-min-noconflict/ext-modelist.js'
 import 'ace-builds/webpack-resolver'
+import { theme } from '@/utils/constants'
 
 export default {
   name: 'editor',
@@ -45,6 +46,10 @@ export default {
       mode: modelist.getModeForPath(this.req.name).mode,
       wrap: true
     })
+
+    if (theme == 'dark') {
+      this.editor.setTheme("ace/theme/twilight");
+    }
   },
   methods: {
     keyEvent (event) {

frontend/src/components/settings/Themes.vue

@@ -0,0 +1,18 @@
+<template>
+  <select v-on:change="change" :value="theme">
+    <option value="">{{ $t('settings.themes.light') }}</option>
+    <option value="dark">{{ $t('settings.themes.dark') }}</option>
+  </select>
+</template>
+
+<script>
+export default {
+  name: 'themes',
+  props: [ 'theme' ],
+  methods: {
+    change (event) {
+      this.$emit('update:theme', event.target.value)
+    }
+  }
+}
+</script>