#1 emXML editor: deleted fixations only marked in one eye

[Gary Feng]

The editor uses a filter to select only one eye for
display. When fixations are "deleted", they are marked
with a "deleted='1' " attribution in the <FIX >
element. However, this is marked only for the eye that
is currently being edited, not the one that is filtered
out temporarily.

Solution: Try to find the corresponding FIX in the
other eye, and mark it. Problem is, the FIX of the two
eyes do not match perfectly. Temporally, however, they
should at least overlap significantly (provided one is
not lost track or broken too much). This can be done.