[editor-ui] Improve no-selection text

projects/editor/src/app/components/properties-panel/element-properties-panel.component.css

@@ -55,3 +55,9 @@ mat-tab-group {
 .button-group {
   border: 3px groove;
 }
+
+.no-selection {
+  text-align: center;
+  padding-top: 10%;
+  font-size: large;
+}

projects/editor/src/app/components/properties-panel/element-properties-panel.component.html

@@ -59,5 +59,5 @@
   </div>
 </div>
 <ng-container *ngIf="selectedElements.length === 0">
-  <p>{{'propertiesPanel.noElementSelected' | translate }}</p>
+  <p class="no-selection">{{'propertiesPanel.noElementSelected' | translate }}</p>
 </ng-container>