Adapt .vue files to style guide (#424)

modules/dmx-datetime/src/main/js/components/dmx-date-picker.vue

@@ -54,7 +54,7 @@ export default {
         // Note: if a date field is cleared in the GUI we receive null here. To clear a field at server-side an empty
         // string must be sent. null would deserialize as JSONObject$Null causing the SimpleValue constructor to fail.
         const c = this.object.children
-        c['dmx.datetime.year'].value  = date && date.getFullYear()  || ''
+        c['dmx.datetime.year'].value  = date && date.getFullYear()  || ''         /* eslint no-mixed-operators: "off" */
         c['dmx.datetime.month'].value = date && date.getMonth() + 1 || ''
         c['dmx.datetime.day'].value   = date && date.getDate()      || ''
       }

modules/dmx-typeeditor/src/main/js/components/dmx-comp-def.vue

 <template>
   <div class="dmx-comp-def">
     <div class="card label">{{card}}</div>
-    <span class="fa icon">{{childType.icon}}</span><span class="type">{{childType.value}}</span><span class="info" v-if="info">{{info}}</span>
+    <span class="fa icon">{{childType.icon}}</span><span class="type">{{childType.value}}</span><span class="info" v-if="info">{{info}}</span><!-- eslint-disable-line max-len -->
   </div>
 </template>
 
@@ -17,7 +17,7 @@ export default {
   computed: {
 
     card () {
-      return this.compDef.isOne ? "One" : "Many"     // TODO: do not hardcode labels?
+      return this.compDef.isOne ? 'One' : 'Many'     // TODO: do not hardcode labels?
     },
 
     childType () {

modules/dmx-typeeditor/src/main/js/components/dmx-data-type-select.vue

 <template>
-  <el-select v-model="type.dataTypeUri">
+  <el-select v-model="type.dataTypeUri"><!-- eslint-disable-line vue/no-mutating-props -->
     <el-option-group label="Simple">
       <el-option :label="dataTypes['dmx.core.text'].value"     :value="dataTypes['dmx.core.text'].uri">
       </el-option>

modules/dmx-typeeditor/src/main/js/components/dmx-type-renderer.vue

@@ -6,7 +6,7 @@
     <div class="field">
       <div class="field-label">Type URI</div>
       <div v-if="infoMode">{{object.uri}}</div>
-      <el-input v-else v-model="object.uri"></el-input>
+      <el-input v-else v-model="object.uri"></el-input><!-- eslint-disable-line vue/no-mutating-props -->
     </div>
     <!-- Data Type -->
     <div class="field">