apply default sorting by username
code styling
use ternary operator for applying default values
switch order direction in arrows
Merge pull request #9 from sschum/osng-471

Osng 471
added a method to load a user by ID to UserService
added initial version of the user edit view and controller
updated l10n properties
handle user updates
fix message name for german internationalisation
reorder the user specific controllers into a new subpackage
add edit button to go to the user edit-mode
remove unnecessary Actions-Button in user view
add link for back button in edit user view
make filter button primary
let throw custom exception if the user was not found
import fix
add integration tests for edit user view
rename request handler to meaningful names
use SCIMHelper.getPrimaryOrFirstEmail() to retrieve the primary email of the user