patch 8.0.1098: build failure if libvterm installed

Problem:    Build failure if libvterm installed on the system. (Oleh
            Hushchenkov)
Solution:   Change the CCCTERM argument order. (Ken Takata, closes vim#2080)

patch 8.0.1097: background color wrong if job changes background color

Problem:    Background color wrong if job changes background color.
Solution:   Get the background color from vterm.

patch 8.0.1096: terminal window in Normal mode has wrong background

Problem:    Terminal window in Normal mode has wrong background.
Solution:   Store the default background and use it for clearning until the
            end of the line.  Not for below the last line, since there is no
            text there.

patch 8.0.1095: terminal multibyte escrape test is flaky

Problem:    Terminal multibyte escrape test is flaky.
Solution:   Add another condition to wait for.

patch 8.0.1094: using ssh from Terminal.app runs into xterm incompati…

…bility

Problem:    Using ssh from Terminal.app runs into xterm incompatibility.
Solution:   Also detect Terminal.app on non-Mac systems.

patch 8.0.1093: various small quickfix issues

Problem:    Various small quickfix issues.
Solution:   Remove ":" prefix from title set by a user. Add the qf_id2nr().
            function. Add a couple more tests.  Update documentation.
            (Yegappan Lakshmanan)

patch 8.0.1092: terminal debugger can't evaluate expressions

Problem:    Terminal debugger can't evaluate expressions.
Solution:   Add :Evaluate and K.  Various other improvements.

patch 8.0.1091: test for <cexpr> fails without +balloon_eval feature

Problem:    Test for <cexpr> fails without +balloon_eval feature.
Solution:   Remove #ifdefs.

patch 8.0.1090: cannot get the text under the cursor like v:beval_text

Problem:    cannot get the text under the cursor like v:beval_text
Solution:   Add <cexpr>.

patch 8.0.1089: cannot get range count in user command

Problem:    Cannot get range count in user command.
Solution:   Add <range> argument.