[FZ Editor] Multiple custom layouts list is not scrollable

[rehsouna11]

Steps to reproduce

when multiple custom layouts are saved, the apply button gets out of the screen, no scrolling is allowed, and the window height is longer than the screen size

Expected behavior

the scroll bar is shown

Actual behavior

The layouts list goes beyond the screen height and they are no longer accessible

Screenshots

[crutkas]

i feel like this is a single attribute of XAML change

[enricogior]

For small screens, the editor was unusable even with two rows (the edit and apply buttons ended up out of the screen because the editor didn't scale and had a fixed size), so we made a fix that at the time was approved only for the small screens case, but it looks good on large screen as well, instead of 3 columns, it uses 5 columns, beside also scaling a little bit down.

Commit for the small screen fix 425a418

[enricogior]

i feel like this is a single attribute of XAML change

When I made the fix for small screens, I gave it a try and added the scroll bar as well but it broke some other logic, I didn't spend too much time on it, so it may be a simple fix, but it requires more than just one attribute change.

[crutkas]

while doubtful, feel we should still try to get in the release here

[crutkas]

This is dependent on the Multi-mon PR