Fix crash tapping action bar button item in the image preview screen on iPad.
Theme in-app action sheet's scroll indicator.
Prevent empty tags around images from busting tables.

See the comment in base.less, which coincidentally is my favourite filename in this repository.
Use Dynamic Type text size as baseline for posts view. "Scale Text" setting can multiply from there.
Fix loading macinyos-wallpaper@2x.png from CSS.

Messing with the URLs seems kinda pointless. If a theme breaks, we can fix it.
temp: thread cell dynamic type
Respond to Dynamic Type changes in table cells.

Not sure I like this DynamicTypeTableViewCell class hierarchy approach, but it's a start.