Extracted surface mesh from segmentation has a hole

[alonsoJASL]

Prerequisites

• Checked the wiki board for common solutions: https://github.com/CemrgAppDevelopers/CemrgApp/wiki
• Checked that your issue isn't already filed: https://github.com/search?q=+is%3Aissue+user%3ACemrgAppDevelopers
• [] Are you providing the log? https://github.com/CemrgAppDevelopers/CemrgApp/wiki/Troubleshooting

Description

In cases where the segmentation reaches an edge of the image, the resulting surface comes with a hole. This has occurred in the scar plugin where a surface mesh is generated from a segmentation.

Proposed solution

I have implemented in branch feature/plugin/atrialfibres on bb3bcee a solution which pads the images with two voxels of zeros at the moment of converting to Nifti (CemrgCommonUtils::ConvertToNifti). This has been tested successfully in a couple of cases.

The question here would be whether this should be the case for absolutely every image that goes through CemrgCommonUtils::ConvertToNifti. Thoughts @OrodRazeghi ?

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