ADD: Code option for CopyField

+ FIX single line styling

frontend/src/components/CopyField.vue

 <template>
   <b-input-group class="copy-field">
     <b-form-textarea v-if="multiline" rows="10" :id="'text-input' + id" ref="textInput" v-model="text"
-                     readonly :class="`border-${variant} text-${variant} invisible-scrollbar`"/>
-    <b-form-input v-else :id="'text-input' + id" ref="textInput" v-model="text" readonly/>
+                     readonly :class="`border-${variant} text-${variant} invisible-scrollbar ${code?'text-monospace':''}`"/>
+    <b-form-input v-else :id="'text-input' + id" ref="textInput" v-model="text"
+                  readonly :class="`border-${variant} text-${variant} invisible-scrollbar ${code?'text-monospace':''}`"/>
     <b-tooltip :target="'text-input' + id" :show.sync="text_copied" :disabled="!text_copied" placement="bottom"
                :variant="variant" :class="`border-${variant} text-${variant}`">
       Kopiert.
@@ -27,6 +28,10 @@ export default {
     'multiline': {
       'type': Boolean,
       'default': false
+    },
+    'code': {
+      'type': Boolean,
+      'default': false
     }
   },
   data() {