Fix single view date references

frontend/app/components/work-packages/wp-single-view/wp-single-view.directive.html

@@ -77,7 +77,7 @@
               wp-edit-field="descriptor.fields[0].name"
               wp-edit-field-label="descriptor.fields[0].label"
               wp-edit-field-wrapper-classes="'-small -shrink'"
-              display-placeholder="::$ctrl.text.[descriptor.name][descriptor.fields[0].name]">
+              display-placeholder="::$ctrl.text[descriptor.name][descriptor.fields[0].name]">
           </div>
 
           <span class="attributes-key-value--value-separator"></span>
@@ -86,7 +86,7 @@
               wp-edit-field="descriptor.fields[1].name"
               wp-edit-field-label="descriptor.fields[1].label"
               wp-edit-field-wrapper-classes="'-small -shrink'"
-              display-placeholder="::$ctrl.text.[descriptor.name][descriptor.fields[1].name]">
+              display-placeholder="::$ctrl.text[descriptor.name][descriptor.fields[1].name]">
           </div>
         </div>
       </div>