menu  function allows selection via up/down + enter in addition to
single character.
Background for selected entry extends the entire line.
Item menu in inventory allows up/down/enter selection as well. compare_split_screen_popup has been abused further, taking an additional optional argument and returning int instead of char.
The inventory now allows selection via up / down / enter keys.
inventory will remember last selection position when backing out of per item menu
Actually remembers selection now. Oops
Merge PR #1038 - scentmap optimization
Merge PR #1080 - pit constructions
Merge PR #1076 - scrolling in menus, inventory
Merge PR #1069 - rags and leather for sewing repairs
Fix iuse::sew indentation
Reduce difficulty to smash a shrub into underbrush.