disable new audit buttons if audit metadata isn't loaded

src/app/dars/dars-view/dars-view.component.html

@@ -34,7 +34,14 @@
         <p class="mat-body">See the progress towards your current program of study and degree plans.</p>
       </div>
       <div>
-        <button mat-raised-button aria-label="Run new degree audit" color="primary" (click)="openNewAuditOptionsDialog()">Run new degree audit</button>
+        <button
+          mat-raised-button
+          aria-label="Run new degree audit"
+          color="primary"
+          [disabled]="(metadataStatus$ | async) != 'Loaded'"
+          (click)="openNewAuditOptionsDialog()">
+          Run new degree audit
+        </button>
       </div>
     </div>
 
@@ -62,6 +69,7 @@
         <button
           mat-raised-button
           aria-label="Run new degree audit"
+          [disabled]="(metadataStatus$ | async) != 'Loaded'"
           color="primary">
           Run new &lsquo;what if&rsquo; audit
         </button>