Hide the work package lookup in modal

frontend/src/app/modules/time_entries/create/create.service.ts

@@ -46,16 +46,17 @@ export class TimeEntryCreateService {
   }
 
   public createNewTimeEntry(date:Moment, wp?:WorkPackageResource) {
-    // Todo handle case that wp is not given
-    let payload = {
-      spentOn: date.format('YYYY-MM-DD'),
-      '_links': {
-        'workPackage': {
-          'href': wp!.href
+    let payload:any = {
+      spentOn: date.format('YYYY-MM-DD')
+    };
+
+    if(wp) {  
+      payload['_links'] = {
+        workPackage: {
+          href: wp.href
         }
-      }
+      };
     }
-
     
     return this.timeEntryDm.createForm(payload).then(form => {
       return this.fromCreateForm(form);

frontend/src/app/modules/time_entries/form/form.component.html

@@ -27,11 +27,13 @@
       </editable-attribute-field>
     </div>
 
-    <div class="attributes-map--key"
+    <div *ngIf="!entry.workPackage" 
+         class="attributes-map--key"
          [ngClass]="{'-required': isRequired('workPackage')}"
          [textContent]="text.attributes.workPackage">
     </div>
-    <div class="attributes-map--value">
+    <div *ngIf="!entry.workPackage" 
+         class="attributes-map--value">
       <editable-attribute-field [resource]="entry"
                                 [fieldName]="'workPackage'">
       </editable-attribute-field>