duplicate widget titles?

[aschweigert]

Observed this on a site using 0.3 but I know I've run into it more recently on sites using 0.4+, let's make sure widgets are not outputting a title twice. This seems particularly to occur in the footer, for some reason (might just be these widgets).

[aschweigert]

this seems to be an issue mostly with default WP widgets, it looks like they added some help text for accessibility that should probably just be visually hidden.

[benlk]

I'm going to hold off on committing this until #882 is merged (because of merge conflicts), but the LESS is:

.widget_archive label,
.widget_categories label {
    .visuallyhidden
}