Mostly GUI updates and fixes for this release
- Fixed mapping layers image unit and overlay getting confused if done in certain orders.
- Current image unit no longer available as an overlay in the pop up button.
- Chop area type popover editor table cleaned up.
- Layers inspector view tidied up.
- Fixed typo in help of mapping layers view, add extra paragraph on adding and removing layers.
- Circular warp now properly updates dimensions if image input is changed.