patch 8.0.1376: cursor in terminal not always updated

Problem:    Cursor in terminal not always updated.
Solution:   Call gui_mch_flush(). (Ken Takata)

patch 8.0.1375: window size wrong after maximizing with WinBar

Problem:    Window size wrong after maximizing with WinBar. (Lifepillar)
Solution:   Fix height computations. Redraw window when it is zero height but
            has a WinBar. (closes vim#2356)

patch 8.0.1374: CTRL-A does not work with an empty line

Problem:    CTRL-A does not work with an empty line. (Alex)
Solution:   Decrement the end only once. (Hirohito Higashi, closes vim#2387)

patch 8.0.1373: no error when settting 'renderoptions' before startin…

…g GUI

Problem:    No error when settting 'renderoptions' to an invalid value before
            starting the GUI.
Solution:   Always check the value. (Ken Takata, closes vim#2413)

patch 8.0.1372: profile log may be truncated halfway a character

Problem:    Profile log may be truncated halfway a character.
Solution:   Find the start of the character. (Ozaki Kiichi, closes vim#2385)

patch 8.0.1371: Shift-Insert doesn't always work in MS-Windows console

Problem:    Shift-Insert doesn't always work in MS-Windows console.
Solution:   Handle K_NUL differently if the second character is more than one
            byte. (Yasuhiro Matsumoto, closes vim#2381)

patch 8.0.1370: channel test for callback is flaky

Problem:    Channel test for callback is flaky.
Solution:   Add the test to thelist of flaky tests.

patch 8.0.1369: MS-Windows: drawing underline slow, mFallbackDC not u…

…pdated

Problem:    MS-Windows: drawing underline, curl and strike-throw is slow,
            mFallbackDC not properly updated.
Solution:   Several performance improvements. (Ken Takata, Taro Muraoka,
            Yasuhiro Matsumoto, closes vim#2401)

patch 8.0.1368: cannot drag status or separator of new terminal window

Problem:    Cannot drag status line or vertical separator of new terminal
            window. (UncleBill)
Solution:   Adjust mouse row and column computation. (Yasuhiro Matsumoto,
            closes vim#2410)

patch 8.0.1367