Add "clearable" badge

src-ui/src/app/components/common/clearable-badge/clearable-badge.component.html

@@ -0,0 +1,9 @@
+<button *ngIf="active" class="position-absolute top-0 start-100 translate-middle badge bg-secondary border border-light rounded-circle p-1" title="Clear" i18n-title (click)="onClick($event)">
+    <svg *ngIf="!isNumbered && selected" width="1em" height="1em" class="check m-0 p-0 opacity-75" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
+        <use xlink:href="assets/bootstrap-icons.svg#check-lg"/>
+    </svg>
+    <div *ngIf="isNumbered" class="number">{{number}}<span class="visually-hidden">selected</span></div>
+    <svg width=".9em" height="1em" class="x m-0 p-0 opacity-75" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
+        <use xlink:href="assets/bootstrap-icons.svg#x-lg"/>
+    </svg>
+</button>

src-ui/src/app/components/common/clearable-badge/clearable-badge.component.scss

@@ -0,0 +1,25 @@
+.badge {
+    width: 20px;
+    height: 20px;
+}
+
+.x {
+    display: none;
+}
+
+.number {
+    width: 1em;
+    height: 1em;
+    display: inline-block;
+}
+
+button:hover {
+    .check,
+    .number {
+        display: none;
+    }
+
+    .x {
+        display: inline-block;
+    }
+}

src-ui/src/app/components/common/clearable-badge/clearable-badge.component.ts

@@ -0,0 +1,33 @@
+import { Component, Input, Output, EventEmitter } from '@angular/core'
+
+@Component({
+  selector: 'app-clearable-badge',
+  templateUrl: './clearable-badge.component.html',
+  styleUrls: ['./clearable-badge.component.scss'],
+})
+export class ClearableBadge {
+  constructor() {}
+
+  @Input()
+  number: number
+
+  @Input()
+  selected: boolean
+
+  @Output()
+  cleared: EventEmitter<boolean> = new EventEmitter()
+
+  get active(): boolean {
+    return this.selected || this.number > -1
+  }
+
+  get isNumbered(): boolean {
+    return this.number > -1
+  }
+
+  onClick(event: PointerEvent) {
+    this.cleared.emit(true)
+    event.stopImmediatePropagation()
+    event.preventDefault()
+  }
+}