[ticket/12553] Right-to-left fixes.

- [x] Insert inline/delete buttons in attachment uploader should float left.
- [x] Links in last post column are not clickable.
- [x] Contact icon is not aligned correctly.
- [x] Contact icons should float right.
- [x] Notification dropdown opens to the right and thus appears partly offscreen.
- [x] Live search suggestions should be on the right.
- [x] Text in the ACP alerts should align right.
- [x] ® is cut off in logo.

Responsive:
- [x] Forum name in ACP forum list should align right.
- [x] "Collapsed" table cells are aligned to the left.
- [x] UCP/MCP menu is floated to the right instead of being centered.
- [x] Forum/topic lists are not properly constructed when responsive.
- [x] Post profile floats to the left instead of fully extending above the post.

https://tracker.phpbb.com/browse/PHPBB3-12553
https://tracker.phpbb.com/browse/PHPBB3-12552
We're mirroring the structure of responsive.css to make it easier to find and compare rules.