FEAT #17436 TIME 1:00 added query param mode=summary in GET/users/{id}; added exception for current user in UserController::hasRightByUserId()

FEAT #17436 TIME 0:30 removed GroupController::getGroupPrivilege() route in favor of GroupController::getById()

FEAT #17436 TIME 0:30 fixed UserController::hasRightByUserId(); applied it to UserController::update()

FEAT #17436 TIME 0:30 fixed getManageableGroups() when empty return; fixed permissions on getGroupPrivilege()