Bug fixes and improvements for PropertyIndex discovered during refs #319, mainly contributing to refs #314

* Start index 10 instead 0 for CValueObject (easier to detect bugs)
* Fixed wrong indexes
* Asserts in CPropertyIndex
* Used Icon instead of QPixpmap with indexes, icons are sortable and have a tooltip
* Removed redundant toQVariant methods

src/blackmisc/nwclient.h

@@ -40,13 +40,14 @@ namespace BlackMisc
                 IndexCallsign,
                 IndexVoiceCapabilities,
                 IndexVoiceCapabilitiesString,
-                IndexVoiceCapabilitiesPixmap
+                IndexVoiceCapabilitiesPixmap,
+                IndexVoiceCapabilitiesIcon
             };
 
             //! The Capabilities enum
             enum Capabilities
             {
-                FsdWithInterimPositions,
+                FsdWithInterimPositions = BlackMisc::CPropertyIndex::GlobalIndexAbuseMode,
                 FsdWithModelDescription,
                 FsdAtisCanBeReceived
             };
@@ -60,7 +61,6 @@ namespace BlackMisc
             //! Constructor.
             CClient(const CUser &user) : m_user(user) {}
 
-
             //! Equal operator ==
             bool operator ==(const CClient &other) const;