patch 8.2.3074: popup_atcursor() uses wrong position with concealing

Problem:    popup_atcursor() uses wrong position with concealing.
Solution:   Keep w_wcol in conceal_check_cursor_line(). (closes #8476)
diff --git a/src/normal.c b/src/normal.c
index 18f14ec..56f89f5 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -5747,8 +5747,8 @@
 n_start_visual_mode(int c)
 {
 #ifdef FEAT_CONCEAL
-    // Check for redraw before changing the state.
-    conceal_check_cursor_line();
+    int cursor_line_was_concealed = curwin->w_p_cole > 0
+						&& conceal_cursor_line(curwin);
 #endif
 
     VIsual_mode = c;
@@ -5770,8 +5770,8 @@
 
     setmouse();
 #ifdef FEAT_CONCEAL
-    // Check for redraw after changing the state.
-    conceal_check_cursor_line();
+    // Check if redraw is needed after changing the state.
+    conceal_check_cursor_line(cursor_line_was_concealed);
 #endif
 
     if (p_smd && msg_silent == 0)