Minimum and Maximum sizes for square layout

[paulsmithkc]

trafficstars

On 10in tablets, the images get so big that they create a false bottom, hiding the text below.

This PR incorporates the minimum and maximum size for the square layout to keep images from getting too large on tablets.

[paulsmithkc]

bump

[Justicecoming23]

Wanted to know if you could share the square lay out for building a app 8m new and just learning thanks in advance