patch 8.2.4911: the mode #defines are not clearly named

Problem:    The mode #defines are not clearly named.
Solution:   Prepend MODE_.  Renumber them to put the mapped modes first.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 219751b..667d4f3 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -10452,7 +10452,7 @@
 f_wildmenumode(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
 {
 #ifdef FEAT_WILDMENU
-    if (wild_menu_showing || ((State & CMDLINE) && cmdline_pum_active()))
+    if (wild_menu_showing || ((State & MODE_CMDLINE) && cmdline_pum_active()))
 	rettv->vval.v_number = 1;
 #endif
 }