[ticket/12551] Float breadcrumbs to the right in RTL languages.

PHPBB3-12551
[ticket/12549] Hide topic/forum list <dfn> tags in RTL languages.

PHPBB3-12549
[ticket/12550] Prevent last post column from jumping to second line in RTL.

PHPBB3-12550
Merge pull request #2465 from prototech/ticket/12549

[ticket/12549] Hide topic/forum list <dfn> tags in RTL languages.

* prototech/ticket/12549:
  [ticket/12549] Hide topic/forum list <dfn> tags in RTL languages.
Merge pull request #2466 from prototech/ticket/12550

[ticket/12550] Prevent last post column from jumping to second line in RTL.

* prototech/ticket/12550:
  [ticket/12550] Prevent last post column from jumping to second line in RTL.
Merge pull request #2467 from prototech/ticket/12551

[ticket/12551] Float breadcrumbs to the right in RTL languages.

* prototech/ticket/12551:
  [ticket/12551] Float breadcrumbs to the right in RTL languages.