added new corrected string resources. fixed crash when selecting node type without category set
fixed problem with data getting lost if selecting category or type in edit view
Merge branch 'iPhone2.0Bugfixes' of https://github.com/sozialhelden/wheelmap-iphone2
added changes to make fixes from c445ecde04cfbe41d0a32cded1c06454ac0f1574 become effective on iPad, too.