Changing CSS of module icons does not update it in the mobile app.

When I create the file custom/themes/custom.less with custom label colours using the classes found in #Styleguide/docs/base-theme and rebuild the instance I can see the changes in the Sugar web app, but not in the mobile app.

I tried restarting the mobile app, restarting my phone, logging in again, allowed it to reload when it prompted but nothing makes the module icons update their colour to that of the web app.