patch 8.1.2039: character from 'showbreak' does not use 'wincolor'

Problem:    Character from 'showbreak' does not use 'wincolor'. (Nick Jensen)
Solution:   Mix with 'wincolor'. (closes vim#4938)

patch 8.1.2038: has('vimscript-4') is always 0

Problem:    has('vimscript-4') is always 0.
Solution:   Add "vimscript-4" to the feature table. (Naruhiko Nishino,
            closes vim#4941)

patch 8.1.2037: can call win_gotoid() in cmdline window

Problem:    Can call win_gotoid() in cmdline window.
Solution:   Disallow switching windows. (Yasuhiro Matsumoto, closes vim#4940)

patch 8.1.2036: the str2nr() tests fail

Problem:    The str2nr() tests fail.
Solution:   Add missing part of patch.

patch 8.1.2035: recognizing octal numbers is confusing

Problem:    Recognizing octal numbers is confusing.
Solution:   Introduce scriptversion 4: do not use octal and allow for single
            quote inside numbers.

patch 8.1.2034: dark them of GTK 3 not supported

Problem:    Dark them of GTK 3 not supported.
Solution:   Add the "d" flag in 'guioptions'. (Jonathan Conder, closes vim#4934)

patch 8.1.2033: cannot build with tiny features

Problem:    Cannot build with tiny features.
Solution:   Add #ifdef.

patch 8.1.2032: scrollbar thumb wrong in popup window

Problem:    Scrollbar thumb wrong in popup window.
Solution:   Adjust thumb size and position when scrolled.

patch 8.1.2031: cursor position wrong when resizing and using conceal

Problem:    Cursor position wrong when resizing and using conceal.
Solution:   Set the flags that the cursor position is valid when setting the
            row and column during redrawing. (closes vim#4931)

patch 8.1.2030: tests fail when build with normal features and terminal

Problem:    Tests fail when build with normal features and terminal.
            (Dominique Pelle)
Solution:   Disable tests that won't work. (closes vim#4932)