Modify popup's style

src/app/room-deletion/room-deletion.component.html

 <h3>Are you sure?</h3>
-<p>Do you really want to delete room<br>' {{room.name}} ' ?<br>This action can not be undone.</p>
+<p>Do you really want to delete room <strong>{{room.name}}</strong>? This action can not be undone.</p>
 <div fxLayout="row" fxLayoutAlign="center" fxLayoutGap="10px">
   <button mat-raised-button color="warn" (click)="dialogRef.close('delete')">
     Delete room