flush the net ibuf too

and while there improve the error message.

After a resize we should do the endwin+refresh+clear dance, but in other situations, like when entering the minibuffer, we can simply re-wrap the page and move the windows. This prevents a small flash when entering the minibuffer, as well as fewer redraw (redraw after the command and shortly after because it was scheduled).

cyan is cool, but only if the text is black. On dark terminals, where COLOR_DEFAULT is white for the foreground, using a cyan background is hard to read. Users can always drop something like the following to their configuration file style line.compl.current bg cyan