e50d1c6ff3
Color icons for Red, Green, Blue, were introduced in c13d3e2f7a. They
are translatable but currently using the default transation context
and the `TIP_()` translation macro.
R, G, B as colors should use the BLT_I18NCONTEXT_COLOR context,
and `IFACE_()` since they are not specific to tooltips.