Implementation of task-list renaming.

src/app/app.module.ts

@@ -23,7 +23,8 @@ import {MatCheckboxModule} from '@angular/material/checkbox';
 import { TaskListService } from './core/service/task-list.service';
 import { StorePersistenceService } from './core/service/store-persistence.service';
 import {MatTooltipModule} from '@angular/material/tooltip'; 
-import {MatRippleModule} from '@angular/material/core'; 
+import {MatRippleModule} from '@angular/material/core';
+import { RenameTaskListComponent } from './task-lists/rename-task-list/rename-task-list.component'; 
 
 @NgModule({
   declarations: [
@@ -35,7 +36,8 @@ import {MatRippleModule} from '@angular/material/core';
     AddTaskListComponent,
     HeaderComponent,
     ActiveListTasksComponent,
-    TaskDisplayComponent
+    TaskDisplayComponent,
+    RenameTaskListComponent
   ],
   imports: [
     BrowserModule,