How can I display a modal form, for example a login when the user clicks on an item that requires authentication?
This snippet displays a form in a modal, but because modals disable the keyboard (in order to prevent tabbing out maybe?), it’s impossible to type anything in the form.
Actually it works for me
Sorry, I linked to the wrong snippet. The one I tried used webix.modalbox (like your workaround example Disqus Profile - disqus_wZiScBd8iO) but it seems that I lost my snippet.
Anyway, In the meantime I ended up with the same solution, view: 'window', modal: true - http://webix.com/snippet/f084fb05
The problem is the second time I click on the “Show modal” button, I get a script error.
4 years later, I found the solution 
That snippet calls .close(), which removes the window, with no possibility to bring it back. The correct way to close the window in the UI is to call .hide().