overlay loading when deleting feed from feed activity
-<td-layout-nav color="none">
+<td-layout-nav color="none" *tdLoading="'processingFeed'; mode:'indeterminate'; type:'circle'; strategy:'overlay'; color:'accent'">
<div td-toolbar-content >
<div *ngIf="feed != undefined">{{feed.feedName}} </div>
<span fxFlex="100"></span>
