Adds style for acronyms (#4224).
Optimize associations loading on the issue list.
Allow issue grouping by custom field (#2679).
Translation updates: *pt-BR (#4223) *ru
Fixed: Alternate theme lacking right border if no sidebar present (#4069).
Adds a setting for new projects default modules (#1797).
Adds links to versions on changelog.
Eager load priorities on roadmap and changelog.
Fixes css classes on issue detail view (#4180).
Adds custom fields for versions (#4219).
