patch 8.0.1118: FEAT_WINDOWS adds a lot of #ifdefs

Problem:    FEAT_WINDOWS adds a lot of #ifdefs while it is nearly always
            enabled and only adds 7% to the binary size of the tiny build.
Solution:   Graduate FEAT_WINDOWS.
diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index d33723b..b64b4e4 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -2248,7 +2248,7 @@
 endfunc
 
 func! Test_normal50_commandline()
-  if !has("timers") || !has("cmdline_hist") || !has("vertsplit")
+  if !has("timers") || !has("cmdline_hist")
     return
   endif
   func! DoTimerWork(id)