backport fix for dragging in Firefox
Merge branch 'master' of https://github.com/waterbearlang/waterbear into 212_unique_ids

Bringing in fix for dragging in Firefox
added waterbear namespace
Fix for #201 preserve open/closed status
remove template  code for next and multiple labels / contained
change if/else to if not for single contained win
change to have a single contained block, with all that implies
add next slots back in
fix single labels, restoring collapsed state, Value namespace