patch 9.0.0206: redraw flags are not named specifically

Problem:    Redraw flags are not named specifically.
Solution:   Prefix "UPD_" to the flags, for UPDate_screen().
diff --git a/src/popupmenu.c b/src/popupmenu.c
index 37c4a6d..fd496c8 100644
--- a/src/popupmenu.c
+++ b/src/popupmenu.c
@@ -943,7 +943,7 @@
 		    {
 			pum_position_info_popup(curwin);
 			if (win_valid(curwin_save))
-			    redraw_win_later(curwin_save, SOME_VALID);
+			    redraw_win_later(curwin_save, UPD_SOME_VALID);
 		    }
 # endif
 		    if ((curwin != curwin_save && win_valid(curwin_save))
@@ -963,7 +963,7 @@
 
 			// Return cursor to where we were
 			validate_cursor();
-			redraw_later(SOME_VALID);
+			redraw_later(UPD_SOME_VALID);
 
 			// When the preview window was resized we need to
 			// update the view on the buffer.  Only go back to
@@ -1048,7 +1048,7 @@
 pum_undisplay(void)
 {
     pum_array = NULL;
-    redraw_all_later(NOT_VALID);
+    redraw_all_later(UPD_NOT_VALID);
     redraw_tabline = TRUE;
     status_redraw_all();
 #if defined(FEAT_PROP_POPUP) && defined(FEAT_QUICKFIX)