Feature to activate a website.

[eldy]

• Selection must start with a button "Install" showing price. Then only, we show the message with the combo selection.

• When we enter the domaine name, add a html5 regex rule in field to be sure the website domain name start with www.

• Once we have enter the name of domain, we must update the example of DNS entry to use the value of domain into the example.

• Fix error management if creation of cert or virtual host file fails

• Show a waiting animation during the update.