fix(uui-combobox): Add open functionality with space bar

Author: engijlr

packages/uui-combobox-list/lib/uui-combobox-list.element.ts

@@ -239,6 +239,16 @@ export class UUIComboboxListElement extends LitElement {
         break;
       }
 
+      //Space key
+      case ' ': {
+        const el = e.target as HTMLInputElement;
+        console.log('FROM LIST', el.value);
+        e.preventDefault();
+        e.stopPropagation();
+        this._getActiveElement?.click();
+        break;
+      }
+
       case 'End': {
         e.preventDefault();
         this._goToIndex(this._options.length - 1);

packages/uui-combobox/lib/uui-combobox.element.ts

@@ -307,6 +307,13 @@ export class UUIComboboxElement extends UUIFormControlMixin(LitElement, '') {
       this.#onOpen();
     }
 
+    if (e.key === ' ') {
+      if (this._isOpen) return;
+      e.preventDefault();
+      e.stopImmediatePropagation();
+      this.#onOpen();
+    }
+
     if (e.key === 'Escape' || e.key === 'Enter') {
       this.#onClose();
     }