ncurses vs. slang: oversized dialog backgrounds not painted in curses

[ralesk]

Some translations (unfortunately at this time Hungarian is one of those, I’m sorry about that :) ) make (among others) the General settings dialog big enough that it doesn’t fit on a 80×25 screen.

As such, we noticed some weird issue with the ncurses build of mc: the moment the dialog breaks up due to not being able to fit on the screen, it won’t get filled with the white colour that it usually has. In the slang build, the dialog does not become see-through even when things break into multiple lines.

One issue is then to fix the ncurses code to fill the broken dialog properly; and the other issue is to do something about dialogs so that they don’t break the way it breaks now.

[ralesk]

Example of a broken dialog