Pocket operation no longer respects islands.

[sliptonic]

I created a sketch with an island (ie sketch with order counter clockwise and another with order clockwise and then combined the sketches) and created a pocket operation.

The pocket operation doesn't respect the island. Instead, it pockets both sketches.

This is a bug introduced with commit cea52f7 "fix for Issue 294: operation with multiplie sketches in pocket - tool path revisits sketches"

I'm reverting 'master' to the prior commit.