refs #250, formatting, minor tweaks and fixes

* changed return type for updateFromVatsimDataFileStation
* improved resolution for own aircraft
* convenience method findFirstByCallsign
* automatically convert frequency to MHz for ATC station
* improved output in toQString
* GUI, flight plan formatting
* corrected logging for network context
* override keyword in listmodelbase

src/blackmisc/avatcstation.cpp

@@ -78,7 +78,7 @@ namespace BlackMisc
 
             // frequency
             s.append(' ');
-            s.append(this->m_frequency.toQString(i18n));
+            s.append(this->m_frequency.valueRoundedWithUnit(3,  i18n));
 
             // ATIS
             if (this->hasAtis())
@@ -103,6 +103,7 @@ namespace BlackMisc
             // distance to plane
             if (this->m_distanceToPlane.isPositiveWithEpsilonConsidered())
             {
+                s.append(' ');
                 i18n ? s.append(QCoreApplication::translate("Aviation", "distance")) : s.append("distance");
                 s.append(' ');
                 s.append(this->m_distanceToPlane.toQString(i18n));
@@ -232,6 +233,14 @@ namespace BlackMisc
             return !((*this) == other);
         }
 
+        /*
+         * Frequency
+         */
+        void CAtcStation::setFrequency(const CFrequency &frequency) {
+            this->m_frequency = frequency;
+            this->m_frequency.setUnit(CFrequencyUnit::MHz());
+        }
+
         /*
          * SyncronizeControllerData
          */