where to put icons for the iconset feature?

[Markus Mohrhard]

Hey,

I'm currently implementing the icon set support and have no idea where
to put the icons. There will be around 50 to 60 icons if we want full
compatibility with OOXML.

Should they really be put into the galaxy icon set even if they are
only used in calc core and are not related to the UI code?

Regards,
Markus