tui: allow exiting add/edit connection dialog with ESC key

No reason this wouldn't be allowed.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1339

src/nmtui/nmt-editor.c

@@ -107,6 +107,8 @@ nmt_editor_new(NMConnection *connection)
                         _("Edit Connection"),
                         "fullscreen-vertical",
                         TRUE,
+                        "escape-exits",
+                        TRUE,
                         NULL);
 }
 

src/nmtui/nmtui-edit.c

@@ -398,7 +398,12 @@ nmt_add_connection(void)
 {
     NmtNewtForm *form;
 
-    form = g_object_new(NMT_TYPE_ADD_CONNECTION, "title", _("New Connection"), NULL);
+    form = g_object_new(NMT_TYPE_ADD_CONNECTION,
+                        "title",
+                        _("New Connection"),
+                        "escape-exits",
+                        TRUE,
+                        NULL);
     nmt_newt_form_show(form);
     g_object_unref(form);
 }