patch 9.1.0754: fixed order of items in insert-mode completion menu

Problem:  fixed order of items in insert-mode completion menu
Solution: Introduce the 'completeitemalign' option with default
          value "abbr,kind,menu" (glepnir).

Adding an new option `completeitemalign` abbr is `cia` to custom
the complete-item order in popupmenu.

closes: #14006
closes: #15760

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/optiondefs.h b/src/optiondefs.h
index 8982ac6..4a5bd63 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -653,6 +653,10 @@
 			    {(char_u *)0L, (char_u *)0L}
 #endif
 			    SCTX_INIT},
+    {"completeitemalign", "cia", P_STRING|P_VI_DEF|P_ONECOMMA|P_NODUP,
+			    (char_u *)&p_cia, PV_NONE, did_set_completeitemalign, NULL,
+			    {(char_u *)"abbr,kind,menu", (char_u *)0L}
+			    SCTX_INIT},
     {"completeopt",   "cot",  P_STRING|P_VI_DEF|P_ONECOMMA|P_NODUP,
 			    (char_u *)&p_cot, PV_COT, did_set_completeopt, expand_set_completeopt,
 			    {(char_u *)"menu,preview", (char_u *)0L}