patch 8.0.0947: entering terminal using C-O C-W C-W goes to Insert mode

Problem:    When in Insert mode and using CTRL-O CTRL-W CTRL-W to move to a
            termainal window, get in a weird Insert mode.
Solution:   Don't go to Insert mode in a terminal window. (closes #1977)
diff --git a/src/normal.c b/src/normal.c
index 24ab06d..ea96366 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -1308,6 +1308,12 @@
     }
 #endif
 
+#ifdef FEAT_TERMINAL
+    /* don't go to Insert mode from Terminal-Job mode */
+    if (term_use_loop())
+	restart_edit = 0;
+#endif
+
     /*
      * May restart edit(), if we got here with CTRL-O in Insert mode (but not
      * if still inside a mapping that started in Visual mode).