patch 9.1.0491: Cmdline pum doesn't work properly with 'rightleft'

Problem:  Cmdline pum doesn't work properly with 'rightleft'.
Solution: Don't use curwin->w_p_rl in cmdline mode in pum_redraw().  Use
          a static variable since pum_may_redraw() may be called in any
          mode.  Also correct position of other popups with 'rightleft'.
          (zeertzjq)

closes: #15005

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    491,
 /**/
     490,
 /**/