Little fixes.
Make it not crash when entity name is too long.
Make navigation more efficient: choosing subgroup letter goes straight there, etc.
Bugfix: don't crash when >1 duplicate entity name already present.
Swap quick menu options 7/8.
wip
wip: cleaning up what i hope is right committed lines now, from 20d348f and maybe de94c43.
Not sure how we got some right, some wrong in that commit??  Work in
progress is to allow importing files into the model (2-space per indent
collapsible outlines).
Support importing text outlines as entities/subgroups.
Save date whenever new entity is created.
Export feature.
bugfixes for export feature.
Allow going to the entity that contains a group, not alw/only 2 the grp itself.
(Was this already in there somewhere, other than via search & groups w/ !=1 mbrs?)
Revert "Allow going to the entity that contains a group, not alw/only 2 the grp itself."
Because it was already there: when i thought not, it was coming into a group that's
just a group on an entity, and didn't have any ~hidden containing entity for a subgroup.
Wasted time.
This reverts commit e064da8fefeac3142bfb676dff2d57f980a0a078.
Reorder a menu.
Fix bug causing imports to make group name same as name of its 1st line,
instead of same as the stub entity that contains the group.
Improve handling of group names during export.
fix export file layout, esp for includeMetadata=true.
Allow importing a file without the filename being the first group created.
Little import/export fixes.
Allow nesting groups in more than one containing group.