Fixed static analysis warnings.

Updated version number.

Fixed parts list showing parts with invalid colors.

LeoCAD 0.83.1 tag.

LeoCAD 0.83 tag.

LeoCAD 0.82.2 tag.

LeoCAD 0.82.1 tag.

LeoCAD 0.82 tag.

LeoCAD 0.81 tag.

LeoCAD 0.80.4 tag.