Add helpers to all selectors (#12230)

src/components/ha-icon-picker.ts

@@ -31,6 +31,8 @@ export class HaIconPicker extends LitElement {
 
   @property() public label?: string;
 
+  @property() public helper?: string;
+
   @property() public placeholder?: string;
 
   @property() public fallbackPath?: string;
@@ -57,6 +59,7 @@ export class HaIconPicker extends LitElement {
         allow-custom-value
         .filteredItems=${iconItems}
         .label=${this.label}
+        .helper=${this.helper}
         .disabled=${this.disabled}
         .required=${this.required}
         .placeholder=${this.placeholder}