Message/Popup on Alinka page when the email is sent

[Maciek246]

When someone inputs an email and clicks Daj nam znać button, in the contact form is added a new entry. But the website has no notification that the message is sent. Additionally, the input is not cleared after the click button so the user is confused and clicks the button once again.

AC:

• The website displays a message/popup (redirect to a page with proper message)
• Input is cleared after sending message