Repair motion filter for proxies

The View Model Proxies are currently breaking all filter operations.
This reparis the motion filters

client/src/app/site/motions/models/view-motion.ts

@@ -11,6 +11,7 @@ import { Searchable } from 'app/site/base/searchable';
 import { ViewMediafile } from 'app/site/mediafiles/models/view-mediafile';
 import { ViewTag } from 'app/site/tags/models/view-tag';
 import { ViewUser } from 'app/site/users/models/view-user';
+import { AmendmentType } from '../motions.constants';
 import { ViewCategory } from './view-category';
 import { ViewMotionBlock } from './view-motion-block';
 import { ViewMotionChangeRecommendation } from './view-motion-change-recommendation';
@@ -161,6 +162,20 @@ export class ViewMotion extends BaseViewModelWithAgendaItemAndListOfSpeakers<Mot
         return !!this.amendments && !!this.amendments.length;
     }
 
+    /**
+     * Determine if the motion has parents, is a parent or neither
+     */
+    public get amendmentType(): number {
+        if (this.hasAmendments) {
+            return AmendmentType.Parent;
+        } else if (this.hasParent) {
+            return AmendmentType.Amendment;
+        } else {
+            // not any amendment
+            return 0;
+        }
+    }
+
     /**
      * Get the number of the first diff line, in case a motion is an amendment
      */

client/src/app/site/motions/services/motion-filter-list.service.ts

@@ -55,13 +55,14 @@ export class MotionFilterListService extends BaseFilterListService<ViewMotion> {
      * getFilterOptions (as the workflows available may change)
      */
     public stateFilterOptions: OsFilter = {
-        property: 'state',
+        property: 'state_id',
         label: 'State',
         options: []
     };
 
     public categoryFilterOptions: OsFilter = {
-        property: 'category',
+        property: 'category_id',
+        label: 'Category',
         options: []
     };
 
@@ -78,13 +79,13 @@ export class MotionFilterListService extends BaseFilterListService<ViewMotion> {
     };
 
     public recommendationFilterOptions: OsFilter = {
-        property: 'recommendation',
+        property: 'recommendation_id',
         label: 'Recommendation',
         options: []
     };
 
     public tagFilterOptions: OsFilter = {
-        property: 'tags',
+        property: 'tags_id',
         label: 'Tags',
         options: []
     };