patch 8.1.1829: difference in screenshots

Problem:    Difference in screenshots.
Solution:   Update screenshots.  Change checks in a few more tests.
            (closes #4789)
diff --git a/src/testdir/test_windows_home.vim b/src/testdir/test_windows_home.vim
index 8ac9ce0..3c2db01 100644
--- a/src/testdir/test_windows_home.vim
+++ b/src/testdir/test_windows_home.vim
@@ -1,8 +1,7 @@
 " Test for $HOME on Windows.
 
-if !has('win32')
-  throw 'Skipped: not on MS-Windows'
-endif
+source check.vim
+CheckMSWindows
 
 let s:env = {}