Improve shortcuts modal layout & look

[KievDevel]

BEFORE:

AFTER:

[ketile]

The change to default dialog looks good.

In my opinion we should keep the horizontal dividers and the extra vertical spacing from the original. The original left/right alignment of title and icon should also be kept. These changes will make the list look less cluttered.

[datenreisender]

Agree with Ketil on the stylistic aspects. The technical aspects are fine.

[KievDevel]

@ketile reason for the first implementation is that I don't like distance between label and button shortcuts, it feels too far away with decreased ability to quickly read :( I agree that this way it looks cleaner
Here is an updated version based on the comments:

[ketile]

I recommend removing the colons. Might also use a more narrow version of the dialog if one exists.

[KievDevel]

This was my first attempt, but existing modal is too narrow. Something in between would be perfect, but I didn't want to create another option of the modal for the single use case