Tested on master: 22c38e2d8a058619e3d05534b5e830b750aa4241
Browsers tested: Firefox, Chrome

Steps to reproduce:
1. Start toaster, create new project
2. Under the project page click on the "Import layer" link under "Layers" portion of the "Project configuration" section.
3. Fill up the import layer form.

Expected result:
The "Import and add to project" button becomes active once the form is filled up.

Observed result:
If any of the required fields is filled up using the browser's autocomplete feature, the "Import and add to project" button does not become active.