JS frontend stuff

Move old ember frontend to properly named folder
Add vue based new frontend

frontend-old-ember/app/components/util/map-edit.hbs

@@ -0,0 +1,40 @@
+<div class="{{@wrapper-classes}}">
+  {{#if @readonly}}
+    <ul>
+      {{#each this.args.list as |element|}}
+        <li>
+          <div class="string-array-element-wrapper">
+            <p class="{{@element-key-classes}}">{{element.key}}</p>
+            <p class="{{@element-value-classes}}">{{element.value}}</p>
+          </div>
+        </li>
+      {{/each}}
+    </ul>
+  {{else}}
+    <ul>
+      {{#each this.args.list as |element index|}}
+        <li>
+          <div class="string-array-element-wrapper">
+            <Input @type="text" @value={{element.key}} />
+            <Input @type="text" @value={{element.value}} />
+            <div
+              class="{{@remove-element-classes}}"
+              type="button"
+              {{on "click" (fn this.removeElement index)}}
+            >
+              X
+            </div>
+          </div>
+        </li>
+      {{/each}}
+
+    </ul>
+    <div
+      class="{{@add-element-classes}}"
+      type="button"
+      {{on "click" this.addElement}}
+    >
+      Add element
+    </div>
+  {{/if}}
+</div>