Improved content and layout of OFL button and tooltips (fixed the repeated lines)
Make text lighter and more in tune with practical steps
Added missing newline
Add some comments relevant to class kerning.
Add support for import and export of U. F. O. groups and group kerning rules.
Add missing destructors.
Update Ukrainian translation
Merge pull request #1772 from yurchor/master

Update Ukrainian translation
Improve help string for ResourceFile preference
Merge pull request #1773 from rrthomas/master

Improve help string for ResourceFile preference
Remove HelpDir preference

There’s no need for this: help should always be installed in the right
place for the given build. We should not encourage FF to be installed
without help files, even if this will sometimes happen (e.g. when it’s
packaged, but in that case I’d expect a corresponding -doc package that
installs the help in the right place).

(Suppose a user on an increasingly-mythical multiuser system whose
sysadmin has installed FF but not the help files: in that case, let that
user install their own copy of FF, then they can be sure the help files
they install will actually match it.)
Fix #1769: don't set ResourceFile pref unless user does so explicitly
Merge pull request #1774 from rrthomas/master

Remove HelpDir preference; fix ResourceFile fallback (#1769)
Merge pull request #1511 from n7s/OFL-tooltips

Improved content and layout of OFL button and tooltips
Merge pull request #1760 from fontforge/fontforge_ufo_groups_1

Add experimental support for U. F. O. groups and group kerns.