Add click event service

src/app/shared/services/clickevent.service.ts

+import {Injectable} from '@angular/core';
+import {fromEvent, Observable} from 'rxjs';
+
+@Injectable()
+export class ClickEventService {
+  static clickEvent(): Observable<any> {
+    return fromEvent(document, 'click');
+  }
+}

src/app/shared/shared.module.ts

 import {CommonModule} from '@angular/common';
 import {NgModule} from '@angular/core';
 import {MaterialModule} from '@app/material.module';
+import {ClickEventService} from '@app/shared/services/clickevent.service';
 import {FontAwesomeModule} from '@fortawesome/angular-fontawesome';
 import {library} from '@fortawesome/fontawesome-svg-core';
 import {fas} from '@fortawesome/free-solid-svg-icons';
@@ -21,7 +22,9 @@ const modules = [
     ...modules,
     TranslateModule,
   ],
-  providers: [],
+  providers: [
+    ClickEventService,
+  ],
 })
 export class SharedModule {
 }