Fixes #10154 ### What was happening: 1. Click "Import" in dropdown -> Dropdown stays open 2. Click "Select file" button -> Two events occur: - Button tries to open file dialog - Click event bubbles up, reaches dropdown, dropdown tries to close 3. These competing actions cause the first click to fail ### Fix By closing the dropdown immediately when clicking "Import": No competing event handlers are active The dropdown is fully closed before any file selector interactions The open() function from useDropzone can work without interference