Creating new ants: option to filter out pictures with low tag squareness

[nathaliestroeymeyt]

This could save time in large colonies where looking for appropriate images to create a new ant - if only pictures with good tag squareness are displayed, it decreases browsing time. Plus would remove the risk of orienting the ant on a low squareness pictures, as when one focuses on the center of the image it is possible to not notice the orange warning sign...
This could be implemented as a tickable box so that in case we have some ants with only bad pictures, we can still choose to re-display those images so we can orient/create these ants anyway