It is hard to avoid widgets with the same name in a
large ui file - try harder to record a full focus chain
before decide that we've wrapped, by including the widget
address in the comparison. Note that we don't include
the addresses in the generated output, since that would
make expected output vary from run to run.
Differentiate between wrapping around and
stopping at the end of the focus chain.
Update the existing tests, and add two
new ones where the difference matters.
Add a test that enumerates the focus chain by
emitting move-focus repeatedly, and compares
the result to expected output.
The test expects a ui file and a reference
file as input. The reference file can be created
using the --generate option.
