Fixed 140 - Multiline Entries in KeyServerQueryActivity

 * EditText is now singleLine and has a hint
 * EditText has set inputType=text and imeOptions=actionSearch
 * Implemented listener for the actionSearch event
 * Reformated the source code according to the project specification. Sorry for
   the diff mess :-/

Signed-off-by: Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>