Xpra: Ticket #1918: non-free IEC61966-2.1 embedded color profiles

The following images contain embedded non-free IEC61966-2.1 colour profile:

• icons/scaling.png
• icons/forward.png

$ exiftool icons/scaling.png
Profile Copyright       : Copyright (c) 1998 Hewlett-Packard Company
Profile Description     : sRGB IEC61966-2.1

This means that (propriatary?) graphics editor saved image(s) with embedded non-free IEC61966-2.1 colour profile.

IEC61966-2.1 prohibits modification, see http://www.color.org/srgbprofiles.xalter#v2

Non-free ICC profile can be removed using the following command

exiftool -icc_profile"-<=" {IMAGE.png}

or using GIMP (Image --> Mode --> Convert to Color Profile).