[ticket/12535] Make <a> adjust to the image width

PHPBB3-12535
[ticket/12535] Add events to subsilver2

Forgot subsilver... yet again

PHPBB3-12535
[ticket/12535] Update events.md to RC3

PHPBB3-12535
[ticket/12535] Combine inner clearing CSS rules

PHPBB3-12535
Merge remote-tracking branch 'PayBas/ticket/12535' into develop-ascraeus

* PayBas/ticket/12535:
  [ticket/12535] Combine inner clearing CSS rules
  [ticket/12535] Update events.md to RC3
  [ticket/12535] Add events to subsilver2
  [ticket/12535] Make <a> adjust to the image width