Fix editable ColorTableCell

Update the cell when the content of the ColorPickerChanges.

That only works if the disabled property changes (for whatever reason i have no idea…)
Simplify decision wether to render text or graphics using bindings and conditions
Fix the editing mode again

The table must be set into editing mode before anything can be commited. That is done by selecting the row of the cell in question, than starting edit.
Apply changes from ColorTableCell to this one as well

So value of property is correctly editable.
Create a piechart of all bikes bounded to the milage and the color of the bikes
Set a prefered with for colorpickers in table cells
Reduce number of nested lambdas