add filter service and enable chart states to filter lists

src/app/charts/chart-item/chart-item.component.html

@@ -1,5 +1,5 @@
 <div fxLayout="row" fxLayoutAlign="space-between start">
     <div></div>
-    <div>{{state}}: &nbsp;</div>
+    <div><a href="#">{{state}}</a>: &nbsp;</div>
     <div>{{count}}</div>
 </div>

src/app/charts/chart-item/chart-item.component.ts

@@ -1,16 +1,13 @@
-import { Component, OnInit, Input } from '@angular/core';
+import { Component, Input } from '@angular/core';
 
 @Component({
   selector: 'app-chart-item',
   templateUrl: './chart-item.component.html',
   styleUrls: ['./chart-item.component.scss']
 })
-export class ChartItemComponent implements OnInit {
+export class ChartItemComponent {
   @Input() state: string;
   @Input() count: number;
+
   constructor() { }
-
-  ngOnInit(): void {
-  }
-
 }