Housekeeping
Moves button-strip css to base.css
Adds basic page-wide action strip
Adds i18n to search bar template
Moves page actions
Adds basic uploads list to profile
Adjustments to profile spacing
Prepares local variable for tag filtering

The built-in taggit API method `.similar_objects()` doesn't provide a
way to modify the query at the view level, which means wallpaper
recommendations with more severe purity ratings can slip through.

The solution is probably to implement our own `similar_objects()`
method, which is unfortunate, but necessary.