If you maximize a text area, it hides the main buttons "save" and "cancel". Some users are unaware that they have to minimize the text area again, in order to save their changes. They click on the "x" of a dialog to close it. This cancels all changes without asking for confirmation, causing users to loose their work.

I suggest we do the following:

1. We keep showing the buttons at the bottom edge of the visible area (see attachment), even if a text input area is maximized.
2. When the user hits one of the buttons, we first minimize the full-height text input area again, then validate the input fields. This way, we can show warnings and errors using existing means.

Ideally, we would also show a confirmation message if the user hits "cancel" or the "x", as we already do when the user hits "ESCAPE". However, I would only add this once we're able to properly detect if a form has non-saved data, and we can't do that currently (see MGNLUI-2884).