extra space seems to be erratic and it is sometimes left blank until
window is dismissed and re-created via 'i' or toggling 'perm_invent'.
-When the map is clipped, sometimes panning leaves a gap in the display.
-Test case was with the map manually resized to avoid overlap with the
-persistent inventory window (resizing added scrollbars which hadn't
-been there previously). The level was fully mapped and hero was in a
-room on the left side; clicking on horizontal scrollbar to pan to the
-right rendered the map correctly. However, issuing a command that
-caused the map to auto-pan back to show the hero didn't render it
-correctly. A portion of map which had been hidden beneath the vertical
-scrollbar while panned got moved into the middle of the window but got
-shown there with a vertical strip of unrendered background that was
-approximately half the width of the vertical scrollbar. It wasn't
-inserted space in between two sides of map; it was undrawn map. If it
-had been drawn, the map would have been normal.
-
Menus which have entries that are too wide to display have their wide
lines truncated rather than adding a horizontal scrollbar. Resizing
larger doesn't recover truncated text and resizing smaller truncates