This commit also fixes the application of the empiricalShift in the
tracking algorithm. It is now applied the same way as the offsets,
namely: TOA + -1 * empiricalShift

The first two values are cut off because they are too bright to be seen on a white canvas.

chore: Replaced "Plot residuals" checkbox with value of calculated/measured soundspeed in track parameter panel

The soundsource combinations table now has a "use" boolean for enabling/disabling the combination during tracking.

Added a new column to the tracking parameter panel ReferencePositionEnd. Adjusted the tracking algorithms accordingly.

Added first version of the new backward tracking method. It is now possible to use interpolation methods as well.

Bugfix, Plotting the soundsource line segments used a wrong algorithm to estimate the already processed combinations.