Add HTML support to system-wide alert banner. Fixes DSpace#3019.

Author: abelgomez

src/app/system-wide-alert/alert-banner/system-wide-alert-banner.component.html

@@ -21,7 +21,7 @@
             } }}
         </span>
             </span>
-            <span>{{(systemWideAlert$ |async)?.message}}</span>
+            <span [innerHTML]="(systemWideAlert$ |async)?.message"></span>
         </div>
     </div>
 </div>

src/app/system-wide-alert/alert-form/system-wide-alert-form.component.html

@@ -99,7 +99,7 @@ <h1 id="header">{{'system-wide-alert.form.header' | translate}}</h1>
             } }}
         </span>
             </span>
-            <span>{{formMessage.value}}</span>
+            <span [innerHTML]="formMessage.value"></span>
         </div>
     </div>