The geofile browser indexes every category record and attribute key a
database holds, which cost the panel far more memory than the file's
bytes: a crafted file of a few megabytes full of empty categories or
attribute keys ran the panel out of memory. The file size cap bounded
nothing here.
The scan now counts records and attribute keys as it keeps them and
refuses a database past 65536 with "too large to browse", which the
cache remembers; the other layout is not retried for the same file.