Added "z-axis" gradient

• You can monitor all the four wheels from the "Open Four Wheels Page". Change what is on X and Y axis from the Settings of that page.
• There's "Z-axis" gradient coloring with min and max values and you can choose which recorded value is it (default is vertical load).
• You can also make all values absolutes, so positives only. Very handy when recording data when it doesn't matter if it's negative or positive value.

This is how Four Wheels Page looks with absolutes enabled:

This is how the G-Force graph looks by default: