Edit Gallery view does not display images in original aspect ratio

[Greybox]

Тhe new gallery preview does display thumbnails in their original aspect ratios, although the modal for creating and editing the gallery does not.

The goal is to show the thumbnails in their original ratio which happens when the thumbnails are not square. This happens, for example, if the thumbnail size in Media Settings is 200 (W) x 400 (H), "Crop thumbnail to exact dimensions" is not checked. Placement of a certain thumbnail within the gallery often depends on the orientation, and it is very difficult if we show a square shape instead of the real shape.

More details:
https://core.trac.wordpress.org/ticket/26959

​http://wordpress.org/support/topic/edit-gallery-square-thumbnails-vs-portrait-and-lanscape?replies=2

[jeremyfelt]

Thanks for the report, @Greybox. This is definitely something worth considering for a future release as it can build on some of the work done in 3.9 and before.

[Greybox]

This would also be nice to get the gallery edit to show/simulate the real layout in "what you see is what you get" form. For example, my gallery is 3 columns, but the edit gallery shows 8 columns.