0.12.1dev: Don't show `None` -> `''` changes in ticket change preview.
0.12.1dev: Avoid wrapping listing table headings.
Closes #9436.
l10n/hu: translations updated (100%)
l10n/es_AR: translations updated (100%)
l10n/it: update translations and fix #9299
l10n/ru: Oops. r10107 refer to trunk. Correct translation to 0.12.1dev (extraction r10081) (100%)
l10n/ru: translations updated (100%)
l10n/en_GB: s/coloring/colouring/
0.12.1dev/l10n/en_GB: Updated to extraction r10081 (100%)
0.12.1dev/l10n/sv: Updated to extraction r10081 (100%)