patch 8.2.2426: allowing 'completefunc' to switch windows causes trouble

Problem:    Allowing 'completefunc' to switch windows causes trouble.
Solution:   use "textwinlock" instead of "textlock".
diff --git a/src/version.c b/src/version.c
index 2e0da2b..ed17716 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2426,
+/**/
     2425,
 /**/
     2424,