start of progress indicator and animation

src/app/app.module.ts

@@ -1,6 +1,7 @@
 import { BrowserModule } from '@angular/platform-browser';
 import { NgModule } from '@angular/core';
 import { HttpClientModule, HttpClientXsrfModule } from '@angular/common/http';
+import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 
 import { MatTableModule } from '@angular/material/table';
 import { MatPaginatorModule } from '@angular/material/paginator';
@@ -8,13 +9,13 @@ import { MatSortModule } from '@angular/material/sort';
 import { MatInputModule } from '@angular/material/input';
 import { MatButtonToggleModule } from '@angular/material/button-toggle';
 import { MatCardModule } from '@angular/material/card';
+import { MatProgressBarModule } from '@angular/material/progress-bar';
 import { FlexLayoutModule } from '@angular/flex-layout';
 
 import { httpInterceptorProviders } from './http-interceptors';
 import { AppRoutingModule } from './app-routing.module';
 import { AppComponent } from './app.component';
 
-import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { StatusListComponent } from './lists/status-list/status-list.component';
 import { DeviceListComponent } from './lists/device-list/device-list.component';
 import { DonutChartComponent } from './charts/donut-chart/donut-chart.component';
@@ -52,6 +53,7 @@ import { FolderListComponent } from './lists/folder-list/folder-list.component';
     MatSortModule,
     MatButtonToggleModule,
     MatCardModule,
+    MatProgressBarModule,
     FlexLayoutModule,
     HttpClientModule,
     HttpClientXsrfModule.withOptions({