Mini image size mismatch

[lumatijev]

In documentation it's stated that 'mini image' has a size of 20px but example of such has size of 35px (also in source code it's stated 35px).
Place where I found that size matches 20px is in dropdown menu that contains image (mini avatar image). The reason for that is max-height: 2em property of aforementioned.

[jlukic]

Hi, the table should read 35px for mini sizes. Images inside dropdown items are also limited by a maximum height when inside dropdown item

I've adjusted the table to have the correct value with next release.