Second attempt to bypass Apache mod_security

Closes #189

Inconsistency between media queries and qa_is_mobile_probably()

Slightly hacky since answers/comments don’t have titles. Probably need
to switch to schema.org microdata instead.

Added horizontal lines in Snow theme and increased spacing in
Classic/Candy themes to help distinguish between each plugin and its
options.

Handle button text with double quotes.

Add styles for cancel button on wide form.
Add styles for ‘saverecalc’ button.

Removed textdir and a few @ operatos in the SnowFlat theme

Fixes #180.

Shrink user avatar height and prevent overlapping (fixes #170).
Add hidden and flagged styles (fixes #168).
Add label to Login icon.
Move a function back into qa-theme.php.

Switch to new “no CAPTCHA”