Code review comment for lp:~widelands-dev/widelands/bug-536489-dropdown

Hello Gun,
thanks for your work.

* the Autoclose when leaving feels reasonbale. OK for me
* Esc-Key is handled as expected.

There is one confusion however:
The menu has a Selection - via a background color - and a checkmark.
When I use the cursor keys to scroll both, the selection and the
checkmark change. So I assume I made the choice. When I then leave
the list, I find that my selection was not applied (so the checkmark is wrong).

Please improve as follows: do not move the checkmark until the selection
in finally confirmed by clicking or by pressing return.