patch 8.1.0826: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_VIRTUALEDIT.  Adds about 10Kbyte to the code.
diff --git a/src/feature.h b/src/feature.h
index e2f9e2a..a41e79f 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -199,10 +199,8 @@
 
 /*
  * +virtualedit		'virtualedit' option and its implementation
+ *			Now always included.
  */
-#ifdef FEAT_NORMAL
-# define FEAT_VIRTUALEDIT
-#endif
 
 /*
  * +cmdline_info	'showcmd' and 'ruler' options.