top: cursor repositioning includes line oriented input

top: cursor repositioning includes line oriented input

A recent patch introduced the ability to recognize the
need to reposition the cursor at suspension or program
end. There remained unmet 1 additional potential need.

This commit extends that ability to embrace line input
so that if a user issues ^Z or ^C while being prompted
the resulting shell output will no longer be embedded.

Reference(s):
http://www.freelists.org/post/procps/top-library-miscellaneous-tweaks,7
commit 5c974ff44da4fbbb9170dd15bdd81555c62c31a9

Signed-off-by: Jim Warner <james.warner@comcast.net>