Add SCEA links to visualization section when ready. Added tooltip to links. Resolves #1087. (#1094)

Author: frano-m

spa/src/app/files/releases/release-table/release-table.component.html

@@ -64,7 +64,7 @@ <h2 class="fontsize-xl">{{organView.organ}}</h2>
                 </mat-header-cell>
                 <mat-cell *matCellDef="let element" class="fontsize-xxs dot">
                     <ng-container *ngFor="let visualization of element.visualizations">
-                        <hca-tooltip [tooltipClass]="'hca-tooltip narrow'"
+                        <hca-tooltip [tooltipClass]="'hca-tooltip'"
                                      [tooltipContent]="visualization.description"
                                      [tooltipDisabled]="false"
                                      [tooltipPosition]="'above'">

spa/src/app/files/shared/release.service.ts

@@ -25,7 +25,8 @@ export class ReleaseService {
 
     // Locals
     private PORTAL_DESCRIPTIONS = new Map<string, string>([
-        ["SCP", "Single Cell Portal"]
+        ["SCP", "Single Cell Portal"],
+        ["SCEA", "Single Cell Expression Atlas"]
     ]);
     private RELEASE_FILE_DESCRIPTIONS = new Map<string, string>([
         [`${ReleaseFileType.ANNOTATED_CLUSTERS}h5ad`, "Cumulus output expression matrix; contains clustering information, cell annotations, and log-transformed gene expression (Pegasus, Scanpy, and Seurat compatible)."],