IOT-1379: Added sticky to name column on gateway status table (#148)

* Fixed routing of gateway list + fixed memory leak by unsubscribing properly from gateway fetches

* Fixed routing errors in gateway list

* Changed mqtt datatarget topic placeholder + added tooltip

* Added additional text changes from Product Owner

* Removed maxLenght from device AND gateway EUI, now removes non-hex digits on submit

* Added sticky to name column on gateway status table

Author: fcv-iteratorIt

src/app/gateway/gateway-status/gateway-status.component.html

@@ -20,7 +20,7 @@ <h3 *ngIf="title" class="title">{{title}}</h3>
   <table #gatewayStatus mat-table [dataSource]="dataSource" class="status-table"
     *ngIf="dataSource?.data.length && timeColumns.length; else noGatewayStatusData">
     <!-- Gateway name is the first column -->
-    <ng-container matColumnDef="gatewayName">
+    <ng-container matColumnDef="gatewayName" [sticky]="true">
       <td mat-cell *matCellDef="let element">
         <a [routerLink]="'/gateways/gateway-detail/' + element.id" routerLinkActive="active" *ngIf="shouldLinkToDetails">{{element.name}}</a>
         <span class="text--semibold" *ngIf="!shouldLinkToDetails">{{element.name}}</span>