fix(ui2): dialog paging is inconsistent #39128

Problem:  - Paging keys in the dialog window consume input when the user
            may not expect it. The dismissable title hint intended to
            mitigate that results in having to press Escape twice to
            abandon the prompt.
          - Mimicked "msgsep" float border is taking up unnecessary
            space when window takes up the entire screen.

Solution: - Use (conventional, albeit less convenient) keys intended
            for scrolling to page the dialog window:
            <(Mousewheel/Page)Up/Down>, <Home/End>.
          - Only set the float top border when separation is actually
            necessary, i.e. window does not reach the first row.

0 files changed, 0 insertions, 0 deletions