Full refresh on button when using forms

[brysd]

Issue type

I'm submitting a ... (check one with "x")

• bug report
• feature request
• question about the decisions made in the repository

Issue description

Current behavior:
Check http://akveo.com/ngx-admin/pages/forms/layouts
For some reason when clicking on a button refreshes the full angular app. Try for instance

Form without labels
The full app will be refreshed.

Expected behavior:
No refresh of the app.

Steps to reproduce:
Go to the demo app:: http://akveo.com/ngx-admin/pages/forms/layouts
And try out all the forms. Only the Block form doesn't have the issue.
There seems to be an issue when you use the <form> tag in the HTML code.
Without it there's no issue.

Related code:
Not applicable

Other information:

node: 10.15.3
npm: 6.4.1
OS: Windows 10
Browser: chrome

Angular, Nebular

Angular: 8.0.0
Nebular: 4.1.0

[brysd]

root cause = angular forms not imported in module probably.

[leonlafa]

@brysd This issue has now been resolved, I'm just waiting for my PR to be reviewed

[yggg]

Fixed in #5530