Grid item margin adjustment

It would be nice, Especially for the sake of mobile clients where screen space is a premium, to give the option to adjust the amount of empty space present between grid items. To my knowledge, this isn't currently possible without directly editing the css.

Here are a couple screenshots to help demonstrate what i mean. The first is the current spacing, And the second is what i could cludge together by blindly disabling things in inspect element. This would represent the 'max' spacing adjustment, Where most of the margins between the images are removed and each element is nearly touching.