Implement Authority confidence indicator component

src/app/dso-shared/dso-edit-metadata/confidence-icon/confidence-icon.component.html

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+<i class="fa-fw m-1 p-1"  [ngClass]="getConfidenceTypeCSSClass()" 
+    [ngbTooltip]="'helptext.confidence.indicator.' + getConfidenceTypeName() | translate"></i>
+

src/app/dso-shared/dso-edit-metadata/confidence-icon/confidence-icon.component.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ConfidenceIconComponent } from './confidence-icon.component';
+import { TranslateModule } from '@ngx-translate/core';
+import { MetadataValue } from '../../../core/shared/metadata.models';
+import { ConfidenceType } from '../../../core/shared/confidence-type';
+
+describe('ConfidenceIconComponent', () => {
+  let component: ConfidenceIconComponent;
+  let fixture: ComponentFixture<ConfidenceIconComponent>;
+  let metadataValue: MetadataValue;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [ ConfidenceIconComponent ],
+      imports: [TranslateModule.forRoot()]
+    })
+    .compileComponents();
+
+    metadataValue = Object.assign(new MetadataValue(), {
+      value: 'Regular Name',
+      language: 'en',
+      place: 0,
+      authority: 'Authority value',
+      confidence: ConfidenceType.CF_ACCEPTED
+    });
+
+    fixture = TestBed.createComponent(ConfidenceIconComponent);
+    component = fixture.componentInstance;
+    component.mdValue = metadataValue;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/dso-shared/dso-edit-metadata/confidence-icon/confidence-icon.component.ts

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+import { Component, Input } from '@angular/core';
+import { ConfidenceType } from 'src/app/core/shared/confidence-type';
+import { MetadataValue } from '../../../core/shared/metadata.models';
+
+@Component({
+  selector: 'ds-confidence-icon',
+  templateUrl: './confidence-icon.component.html',
+  styleUrls: ['./confidence-icon.component.scss']
+})
+/**
+ * Component displaying a icon indicator confidence of an authority value
+ */
+export class ConfidenceIconComponent {
+
+  @Input() mdValue: MetadataValue;
+
+  getConfidenceTypeCSSClass() {
+    switch (this.mdValue.confidence) {
+      case ConfidenceType.CF_ACCEPTED: return 'far fa-circle-check';
+      case ConfidenceType.CF_UNCERTAIN: return 'fa fa-gear';
+      case ConfidenceType.CF_AMBIGUOUS: return 'far fa-circle-question';
+      case ConfidenceType.CF_NOTFOUND: return 'far fa-thumbs-down';
+      case ConfidenceType.CF_FAILED: return 'fa fa-triangle-exclamation';
+      case ConfidenceType.CF_REJECTED: return 'fas fa-turn-down';
+      case ConfidenceType.CF_NOVALUE: return 'fas fa-ban';
+      case ConfidenceType.CF_UNSET: return 'fa fa-xmark';
+    }
+    return 'fa fa-xmark';
+  }
+
+  getConfidenceTypeName() {
+    switch (this.mdValue.confidence) {
+      case ConfidenceType.CF_ACCEPTED: return 'accepted';
+      case ConfidenceType.CF_UNCERTAIN: return 'uncertain';
+      case ConfidenceType.CF_AMBIGUOUS: return 'ambigous';
+      case ConfidenceType.CF_NOTFOUND: return 'notfound';
+      case ConfidenceType.CF_FAILED: return 'failed';
+      case ConfidenceType.CF_REJECTED: return 'rejected';
+      case ConfidenceType.CF_NOVALUE: return 'novalue';
+      case ConfidenceType.CF_UNSET: return 'unset';
+    }
+    return 'unset';
+  }
+}