patch 8.2.4325: 'wildmenu' only shows few matches

Problem:    'wildmenu' only shows few matches.
Solution:   Add the "pum" option: use a popup menu to show the matches.
            (Yegappan Lakshmanan et al., closes #9707)
diff --git a/src/drawscreen.c b/src/drawscreen.c
index 5b9619e..6cae313 100644
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -3048,6 +3048,10 @@
     }
     else if (State & CMDLINE)
     {
+#ifdef FEAT_WILDMENU
+	if (pum_visible())
+	    cmdline_pum_display();
+#endif
 	// Don't redraw when in prompt_for_number().
 	if (cmdline_row > 0)
 	{