patch 8.2.0214: a popup window with a terminal can be made hidden

Problem:    A popup window with a terminal can be made hidden.
Solution:   Disallow hiding a terminal popup.
diff --git a/src/version.c b/src/version.c
index e1a2e98..97584e3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    214,
+/**/
     213,
 /**/
     212,