2212/ensure that create cluster button is visible [helix-front] (#2213)

Verify that current user is logged in after loading all clusters
to ensure that create cluster button is visible in left sidebar
diff --git a/helix-front/src/app/cluster/cluster-list/cluster-list.component.html b/helix-front/src/app/cluster/cluster-list/cluster-list.component.html
index 7dfcc28..8b995b8 100644
--- a/helix-front/src/app/cluster/cluster-list/cluster-list.component.html
+++ b/helix-front/src/app/cluster/cluster-list/cluster-list.component.html
@@ -22,12 +22,14 @@
     <mat-spinner> Loading all clusters ... </mat-spinner>
   </section>
   <mat-nav-list *ngIf="!isLoading && !errorMessage">
-    <button mat-button routerLink="/">
-      <mat-icon>arrow_back</mat-icon> Back to Index
-    </button>
-    <button mat-mini-fab *ngIf="can" (click)="createCluster()">
-      <mat-icon>add</mat-icon>
-    </button>
+    <div class="cluster-list-button-group">
+      <button class="back-to-index-button" mat-button routerLink="/">
+        <mat-icon>arrow_back</mat-icon> Back to Index
+      </button>
+      <button mat-mini-fab *ngIf="can" (click)="createCluster()">
+        <mat-icon>add</mat-icon>
+      </button>
+    </div>
     <h3 mat-subheader>Clusters in {{ service }} ({{ clusters.length }})</h3>
     <a
       *ngFor="let cluster of clusters"
diff --git a/helix-front/src/app/cluster/cluster-list/cluster-list.component.scss b/helix-front/src/app/cluster/cluster-list/cluster-list.component.scss
index 13cfeb4..7140ab1 100644
--- a/helix-front/src/app/cluster/cluster-list/cluster-list.component.scss
+++ b/helix-front/src/app/cluster/cluster-list/cluster-list.component.scss
@@ -1,6 +1,25 @@
 @use '@angular/material' as mat;
 @import 'src/theme.scss';
 
+.mat-nav-list {
+  display: flex;
+  flex-direction: column;
+}
+
+.cluster-list-button-group {
+  display: flex;
+  justify-content: space-between;
+  margin-right: 1rem;
+}
+
+.back-to-index-button {
+  align-self: flex-start;
+}
+
+.add-cluster-button {
+  align-self: flex-end;
+}
+
 .mat-spinner {
   margin: 20px;
 }
@@ -14,12 +33,6 @@
   padding: 10px;
 }
 
-.mat-mini-fab {
-  position: fixed;
-  right: 16px;
-  top: 16px;
-}
-
 .empty {
   font-size: 14px;
   // font-style: italic;
diff --git a/helix-front/src/app/cluster/cluster-list/cluster-list.component.ts b/helix-front/src/app/cluster/cluster-list/cluster-list.component.ts
index 164077e..5cda6e2 100644
--- a/helix-front/src/app/cluster/cluster-list/cluster-list.component.ts
+++ b/helix-front/src/app/cluster/cluster-list/cluster-list.component.ts
@@ -17,6 +17,7 @@
   clusters: Cluster[] = [];
   errorMessage = '';
   isLoading = true;
+  // is the currrent user logged in? If true, then yes.
   can = false;
   service = '';
 
@@ -29,6 +30,7 @@
 
   ngOnInit() {
     this.loadClusters();
+    // check if the current user is logged in
     this.clusterService.can().subscribe((data) => (this.can = data));
     this.service = this.router.url.split('/')[1];
   }
@@ -39,6 +41,8 @@
       /* error path */ (error) => this.showErrorMessage(error),
       /* onComplete */ () => (this.isLoading = false)
     );
+    // check if the current user is logged in again
+    this.clusterService.can().subscribe((data) => (this.can = data));
   }
 
   showErrorMessage(error: any) {