Ignore import-outside-toplevel

We now call pylint multipletimes, until now only the last command return
code was evaluated

These examples are outdated

The plugin repository should contain enough working examples

Set buttons sensitive depending on if the page is complete

Use get_page() instead of page specific methods

This avoids being able to open multiple ChatControls for one contact.
Historically, this was used to send a message to a specific resource.

Functionality has been moved to Accounts

- Make handler private
- Fix pylint errors
- Access widgets directly via builder

- Remove ApplicationWindow form glade file, we already inherit form ApplicatonWindow
- Make some methods private
- Fix pylint errors