[SI-2858]
BugFixing Setfiter: Filter also empty string values

projects/grid-failure-information-app/src/app/shared/filters/ag-grid/set-filter/set-filter.component.ts

diff --git a/projects/grid-failure-information-app/src/app/shared/filters/ag-grid/set-filter/set-filter.component.ts b/projects/grid-failure-information-app/src/app/shared/filters/ag-grid/set-filter/set-filter.component.ts
index 43e9643..27ccedf 100644
--- a/projects/grid-failure-information-app/src/app/shared/filters/ag-grid/set-filter/set-filter.component.ts
+++ b/projects/grid-failure-information-app/src/app/shared/filters/ag-grid/set-filter/set-filter.component.ts
@@ -82,7 +82,7 @@
 
   doesFilterPass(params: IDoesFilterPassParams): boolean {
     const itemKey = this._valueGetter(params.node);
-    return this.setItems[itemKey] !== undefined && this.setItems[itemKey].checked;
+    return this.setItems[itemKey || null] !== undefined && this.setItems[itemKey || null].checked;
   }
 
   getModel(): any {