Fix disable/enable custom field when resource is readonly
Fix disable/enable custom field when resource is readonly

svn path=/branches/kdepim/enterprise/kdepim/; revision=958119

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi