tranlate the menu search and the user details dialog to English

Signed-off-by: Otto Linnemann <linneman@gmx.de>
fix correct detection of empty data in serach result

The current version of the server implementation replies
with the json string {:data null} when no matches have been
found. This string has not been correctly processed by
the function request-result-pane within serach.cljs. The
problem should be (hopefully) fully addressed by this
commit.

Signed-off-by: Otto Linnemann <linneman@gmx.de>