Prevent 'Source' popovers from obscuring the heart/reblog buttons while you scroll through your Tumblr dashboard.
Does it drive you nuts when scrolling through your Tumblr dashboard that you can't click the heart button for a post because the heart is hidden by a callout that opened when you rolled over the next post? This simply extension prevents those popovers from getting in the way by hiding them via a simple CSS directive.
v1.0.3 - also hides sponsored ads and various other nuisances.
v1.0.2 - now compatible with HTTPS secure Tumblr dashboard.