[BalooRolesProvider] Use Property IDs instead of string matching
Instantiating KFileMetaDataInfo for each file and property, even when the role is not used, is somewhat expensive and unnecessary. Use the numeric Property ID to map it to a role, and only instantiate the used PropertyInfo's. Remove the properties provided by KFM::UserMetaData from the map, as these will newer match.
Showing with 36 additions and 37 deletions