Improved line chart, brought back movement on HUD (but still looks somewhat wrong on the dials). Fixed logging for ground time mode

Substantially bugfixed and improved deactivation/activation and persistence of widgets. A lot of testing of Google Earth view, only minor improvements

Significantly improved plotting, now capturing data in linechart allows limmediate processing / analysis of the whole flight

Improved runtime performance, currently hunting down a bug where the whole application gets repainted although only parts of it are refreshed