Synchronized Zoom, SAT, DOP and New Graph

Some new features:

• Zooming one graph will now zoom all other graphs in the same way. This can be disabled by clicking the icon representing two arrows on the top of the graph
• New Graph button on the top of the analyze window can be used to quickly add new graphs
• Sat (number of satellites), VDOP, PDOP and HDOP was added to the list of imported fields for GPX format