Fix frontend segmentation template creation process

[zdeveloper]

The app currently cycles all pages to create a segmentation template, this leads to noticeable delay but most importantly, you have to be on the last page for it to work correctly.

Acceptance Criteria

• Refactor the area of the code to utilize the hidden attribute, aka, keep all images in the dom all all times, that way no need to recycle them.
• Remove the border around the created segmentation template.