[css3-userint] Indeterminate content

Section 4.6 provides values for "indeterminate states" of radio
buttons and checkboxes. The suffix for this state in the provided
keywords is "-ind", because obviously Indeterminate is fairly long and
difficult for non-English speakers to spell correctly.

I would like to suggest that this state as used in OSes, more often
than not, does not represent an indeterminate state at all (i.e. the
site or app cannot determine what state the control should be in) but
rather it represents a mixed state, for example a checkbox that covers
a sub-tree of other checkboxes that may be both on and off. Given
this, I propose that the suffix for this state be "-mixed" and that
the wording of §4.6 be changed to reflect that the usage is
predominantly that of a mixed state, but may also be used for an
indeterminate state (at least, in Level 3).

-- 
Nicholas.