patch 8.0.1434: GTK: :promtfind does not put focus on text input

Problem:    GTK: :promtfind does not put focus on text input. (Adam Novak)
Solution:   When re-opening the dialog put focus on the text input. (Kazunobu
            Kuriyama, closes #2563)
diff --git a/src/version.c b/src/version.c
index 6ebb01a..bace9d3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1434,
+/**/
     1433,
 /**/
     1432,