Support custom icons in widget config.

ui-ngx/src/app/modules/home/components/widget/widget-config.component.html

@@ -71,6 +71,7 @@
             </mat-form-field>
             <tb-material-icon-select asBoxInput
                                      iconClearButton
+                                     allowedCustomIcon
                                      [color]="widgetSettings.get('iconColor').value"
               formControlName="titleIcon">
             </tb-material-icon-select>

ui-ngx/src/app/shared/components/material-icons.component.html

@@ -86,7 +86,7 @@
       </button>
     </div>
   } @else {
-    <tb-gallery-image-input class="min-w-[520px]"
+    <tb-gallery-image-input [style.width]="iconsPanelWidth"
                             [(ngModel)]="selectedIcon">
     </tb-gallery-image-input>
     <div class="tb-material-icons-panel-buttons">