GUI:  UX for facility administration

- Added filtering above TaskResults.
- Display type of destination as UpperCase.
- Inform, that "Services destinations" define, where service configuration
  is propagated. Show warning on delete hosts/destinations, informing
  about services propagations.
GUI: improved adding facility destinations

- Updated dialog for adding services destinations.
  Suggest existing hosts when destination is HOST type.
  Check for valid email format when MAIL and SIGNED_MAIL
  destination format.
Merge pull request #242 from zlamalp/fac_setting

GUI: UX for facility administration