- Fix (Firefox): tspan (and textPath apparently) have no `getBBox` in Firefox, so recover (fixes FF issue with recalculate test 3: "recalculateDimensions() on text w/tspan with simple translate")
- Fix (Chrome): Chrome has a bug in not performing `removeAttribute` after `removeItem`; deal with it (though only if there is a single identity matrix) (fixes Chrome issue with recalculate test 1: " recalculateDimensions() on rect with identity matrix")