Expose time interval to user in config file for sky browser topic. This will give the user control over how often data is passed. Hopefully a future proof fix for GPU crash

modules/server/include/topics/skybrowsertopic.h

@@ -46,6 +46,7 @@ private:
     int _targetDataCallbackHandle = UnsetOnChangeHandle;
     bool _isDone = false;
     std::chrono::system_clock::time_point _lastUpdateTime;
+    std::chrono::milliseconds _skyBrowserUpdateTime = std::chrono::milliseconds(100);
 };
 
 } // namespace openspace