patch 8.0.1171: popup test is still a bit flaky

Problem:    Popup test is still a bit flaky.
Solution:   Change term_wait() calls. (Ozaki Kiichi)

patch 8.0.1170: using termdebug results in 100% CPU time

Problem:    Using termdebug results in 100% CPU time. (tomleb)
Solution:   Use polling instead of select().

patch 8.0.1169: highlignting one char too many with 'list' and 'cul'

Problem:    Highlignting one char too many with 'list' and 'cul'.
Solution:   Check for 'list' being active. (Ozaki Kiichi, closes vim#2177)

patch 8.0.1168: wrong highlighting with combination of match and 'cur…

…sorline'

Problem:    wrong highlighting with combination of match and 'cursorline'.
Solution:   Use "line_attr" when appropriate. (Ozaki Kiichi, closes vim#2111)
            But don't highlight more than one character.

patch 8.0.1167: Motif: typing in terminal window is slow

Problem:    Motif: typing in terminal window is slow.
Solution:   Do not redraw the whole terminal window but only was was changed.

patch 8.0.1166: :terminal doesn't work on Mac High Sierra

Problem:    :terminal doesn't work on Mac High Sierra.
Solution:   Change #ifdef for OpenPTY(). (Ozaki Kiichi, Kazunobu Kuriyama,
            closes vim#2162)

patch 8.0.1165: popup test is still flaky

Problem:    Popup test is still flaky.
Solution:   Add a term_wait() call. (Ozaki Kiichi)

patch 8.0.1164: changing StatusLine highlight does not always work

Problem:    Changing StatusLine highlight while evaluating 'statusline' may
            not change the status line color.
Solution:   When changing highlighting while redrawing don't cause another
            redraw. (suggested by Ozaki Kiichi, closes vim#2171, closes vim#2120)

patch 8.0.1163: popup test is flaky

Problem:    Popup test is flaky.
Solution:   Add a WaitFor() and fix another.

patch 8.0.1162: shared script for tests cannot be included twice

Problem:    Shared script for tests cannot be included twice.
Solution:   Include it where needed, it will "finish" if loaded again.