ML-Herbarium: Feature - improve segmentation accuracy/consistency

[chasem151]

• Segmentation cuts off far less text now
• This text is now far less cut off on the left, top, and bottom sides especially
• The right side needs work because the text is usually in the bottom right of the image, there needs to be error handling for when expanding the right border to include all text may expand the box outside the boundaries of the entire image, thus corrupting the file occasionally Example:

[eamonniknafs]

closing stale PR