To fix

[tom-dq]

• "Chain" of elements - why are they staying?
• Avoid the "singular" problem when there are unconstrained checkerboard patches
• When a removal is skipped because it would lead to a disconnection, keep it in the queue in case a later removal means this is no longer a disconnection
• energy density vs element total

[tom-dq]

Item one is fixed. Item two - a working example is in C:\Simulations\StentOpt\AA-95 (i think)