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/edit.c b/src/edit.c
index 9162fe6..d944080 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -147,6 +147,9 @@
 #ifdef FEAT_JOB_CHANNEL
     int		cmdchar_todo = cmdchar;
 #endif
+#ifdef FEAT_CONCEAL
+    int		cursor_line_was_concealed;
+#endif
 
     // Remember whether editing was restarted after CTRL-O.
     did_restart_edit = restart_edit;
@@ -222,9 +225,9 @@
     }
 
 #ifdef FEAT_CONCEAL
-    // Check if the cursor line needs redrawing before changing State.  If
-    // 'concealcursor' is "n" it needs to be redrawn without concealing.
-    conceal_check_cursor_line();
+    // Check if the cursor line was concealed before changing State.
+    cursor_line_was_concealed = curwin->w_p_cole > 0
+						&& conceal_cursor_line(curwin);
 #endif
 
     /*
@@ -283,6 +286,12 @@
 
     stop_insert_mode = FALSE;
 
+#ifdef FEAT_CONCEAL
+    // Check if the cursor line needs redrawing after changing State.  If
+    // 'concealcursor' is "n" it needs to be redrawn without concealing.
+    conceal_check_cursor_line(cursor_line_was_concealed);
+#endif
+
     /*
      * Need to recompute the cursor position, it might move when the cursor is
      * on a TAB or special character.