patch 8.1.0726: redrawing specifically for conceal feature

Problem:    Redrawing specifically for conceal feature.
Solution:   Use generic redrawing methods.
diff --git a/src/main.c b/src/main.c
index 2f8f052..7c8014c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1194,6 +1194,22 @@
 		last_cursormoved = curwin->w_cursor;
 	    }
 
+#if defined(FEAT_CONCEAL)
+	    if (conceal_update_lines
+		    && (conceal_old_cursor_line != conceal_new_cursor_line
+			|| conceal_cursor_line(curwin)
+			|| need_cursor_line_redraw))
+	    {
+		if (conceal_old_cursor_line != conceal_new_cursor_line
+			&& conceal_old_cursor_line
+						<= curbuf->b_ml.ml_line_count)
+		    redrawWinline(curwin, conceal_old_cursor_line);
+		redrawWinline(curwin, conceal_new_cursor_line);
+		curwin->w_valid &= ~VALID_CROW;
+		need_cursor_line_redraw = FALSE;
+	    }
+#endif
+
 	    /* Trigger TextChanged if b:changedtick differs. */
 	    if (!finish_op && has_textchanged()
 		    && curbuf->b_last_changedtick != CHANGEDTICK(curbuf))
@@ -1288,22 +1304,6 @@
 	    may_clear_sb_text();	/* clear scroll-back text on next msg */
 	    showruler(FALSE);
 
-#if defined(FEAT_CONCEAL)
-	    if (conceal_update_lines
-		    && (conceal_old_cursor_line != conceal_new_cursor_line
-			|| conceal_cursor_line(curwin)
-			|| need_cursor_line_redraw))
-	    {
-		mch_disable_flush();	/* Stop issuing gui_mch_flush(). */
-		if (conceal_old_cursor_line != conceal_new_cursor_line
-			&& conceal_old_cursor_line
-						<= curbuf->b_ml.ml_line_count)
-		    update_single_line(curwin, conceal_old_cursor_line);
-		update_single_line(curwin, conceal_new_cursor_line);
-		mch_enable_flush();
-		curwin->w_valid &= ~VALID_CROW;
-	    }
-#endif
 	    setcursor();
 	    cursor_on();