top: stop neglecting potential utf8 field descriptions

And I thought those strange characters I saw with only
certain translations in Fields Management descriptions
were resulting from my terminal emulator deficiencies.

Turns out that ol' top wasn't addressing possibilities
of such descriptions ending with multi-byte sequences.

Signed-off-by: Jim Warner <james.warner@comcast.net>
1 job for master in 2 minutes and 18 seconds (queued for 25 seconds)
Status Job ID Name Coverage
  Test
passed #43618085
MakeCheck

00:02:18