Make FSUIPC/SB offsets configurable

* based https://swift-project.slack.com/archives/CC6THKCAZ/p1538387046000100
* "dot" commands added
* Plugin settings

src/plugins/simulator/fsxcommon/fsxsettingscomponent.h

@@ -49,6 +49,12 @@ namespace BlackSimPlugin
             //! Terrain probe checkbox changed
             void onEnableTerrainProbeChanged();
 
+            //! FSUIPC setting changed
+            void onFsuipcChanged();
+
+            //! Offsets on/off
+            void onSBOffsetsChanged();
+
             //! Copy the terrain probe
             void copyTerrainProbe();