hgview #83294 make layout of qt version identical to curses version [validation pending]

The curses version has 3 panes and a line "-- description --" in the list of files to display the commit message. I like it better than the current layout of the qt version that splits the bottom-left pane in two with the upper part displaying the message.

Please make the layout of the qt version identical to the layout of the curses version.

done in1.6.0
load left0.000
closed by<not specified>