prestashop 1.7.* products page don't have display all images button

[jecisa]

I used a multi-size and color combination, the previous product table has a few default pictures, when I updated the Combinations file, all the cover pictures can not be displayed on the product page, the picture is only shown in Combinations specified pictures.
But in the background is to see all the cover pictures,

1. I would like to ask, before the Prestashop 1.6. * version Have the "Display all images" button, but in the latest version of pre 1.7. * version, There is no "Display all images" button, why? Is this a bug?i just want to display all images.

 

 

2. Now the combination of the document less 'Delete existing images (0 = No, 1 = Yes)' this feature, each time the combination of documents will be repeated a lot of repeated pictures

 

[sheepdear]

asking the same