patch 8.0.0921: terminal window cursor shape not supported in the GUI

Problem:    Terminal window cursor shape not supported in the GUI.
Solution:   Use the terminal window cursor shape in the GUI.

patch 8.0.0920: cursor wrong after switching altscreen in terminal

Problem:    The cursor shape is wrong after switch back from an alternate
            screen in a terminal window. (arius Gedminas)
Solution:   Change bitfield to unsigned.  Set flag that cursor shape was set.

patch 8.0.0919: cursor color isn't set on startup

Problem:    Cursor color isn't set on startup.
Solution:   Initialize showing_mode to invalid value.

patch 8.0.0918: cannot get terminal window cursor shape or attributes

Problem:    Cannot get terminal window cursor shape or attributes.
Solution:   Support cursor shape, attributes and color.

patch 8.0.0917: MS-Windows:CTRL-C handling in terminal window is wrong

Problem:    MS-Windows:CTRL-C handling in terminal window is wrong
Solution:   Pass CTRL-C as a key. Turn CTRL-BREAK into a key stroke. (Yasuhiro
            Matsumoto, closes vim#1965)

patch 8.0.0916: cannot specify properties of window for terminal open

Problem:    Cannot specify properties of window for when opening a window for
            a finished terminal job.
Solution:   Add "term_opencmd".

patch 8.0.0915: wrong initialisation of global

Problem:    Wrong initialisation of global.
Solution:   Use INIT().

patch 8.0.0914: highlight attributes are always combined

Problem:    Highlight attributes are always combined.
Solution:   Add the 'nocombine' value to replace attributes instead of
            combining them. (scauligi, closes vim#1963)

patch 8.0.0913: MS-Windows: CTRL-C kills shell in terminal window

Problem:    MS-Windows: CTRL-C kills shell in terminal window instead of the
            command running in the shell.
Solution:   Make CTRL-C only send a CTRL_C_EVENT and have CTRL-BREAK kill the
            job. (partly by Yasuhiro Matsumoto, closes vim#1962)

patch 8.0.0912: cannot run a job in a hidden terminal

Problem:    Cannot run a job in a hidden terminal.
Solution:   Add option "hidden" and ++hidden.