[ADF-3053] breadcrumb fixes (#3406)

* translate breadcrumb root in demo shell

* optional "max items" feature and style fixes

* should not be restricted by default

* style updates

* toolbar and breadcrumb layout fixes

* breadcrumb demo and testing page

* full toolbar scenario

* fix translation issue with the dropdown and custom root

* a11y fixes

* fix issue with duplicate id, remove unused attribute

lib/content-services/breadcrumb/dropdown-breadcrumb.component.html

@@ -10,7 +10,7 @@
     <mat-icon class="adf-dropdown-breadcrumb-item-chevron">chevron_right</mat-icon>
 
     <mat-select
-        #select
+        #dropdown
         *ngIf="hasPreviousNodes()"
         class="adf-dropdown-breadcrumb-path"
         tabindex="0"