As of workshop RW/KB, improved / fixed text messages

Also refs #351
* messages can be formatted with style sheet
* fixed: removed command from message
* added originator to command line
* msg parsing now in core
* using ITimestampBased for text messages and status messages
* allow to resize rows to content (view base)
* model / views for text messages
* removed old qt stylesheets

src/blackmisc/avcallsign.h

@@ -60,6 +60,9 @@ namespace BlackMisc
             //! Observer callsign?
             bool isObserverCallsign() const;
 
+            //! Supervisor?
+            bool isSupervisorCallsign() const;
+
             //! Get callsign.
             const QString &asString() const { return this->m_callsign; }