All files in
/share can be over-ridden by placing files in the user's configuration folder (e.g.
Configurable contents now includes extensions, filters, fonts, gradients, icons, keyboard shortcuts, [preset markers (?)], [user paint servers (what is this?)], palettes, patterns, about screen, symbol sets, templates, tutorials and some user interface configuration files. Only the file 'units.xml' cannot be overridden.