Do not log a metadata event when the user presses the wrong key

Do not log metadata-open when panel is already fully open and the
user presses the open key. (Same with close).

Also a completely unrelated code simplification.

Change-Id: I1f26b8669aa496d68b61d9a432430bf0864e8533
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/559
Merge "Do not log a metadata event when the user presses the wrong key"