[ADF-2627] Icons-only mode for Info Drawer (#3398)

* tab with icon

* docs

* test

lib/core/info-drawer/info-drawer.component.ts

@@ -22,9 +22,14 @@ import { MatTabChangeEvent } from '@angular/material';
     template: '<ng-template><ng-content></ng-content></ng-template>'
 })
 export class InfoDrawerTabComponent {
+    /** The title of the tab. */
     @Input()
     label: string = 'Main tab';
 
+    /** Icon to render for the tab. */
+    @Input()
+    icon: string = null;
+
     @ViewChild(TemplateRef)
     content: TemplateRef<any>;
 }