Fixprofilepagelayoutjumpingwhenscrolling

The first post height was affected by the floating block when affix wasn't active.

This issue is best observed when there are many menu items on the left (link to settings, link to Masquerade, ...) and the first post listed for the user is very short.

For some reason the floating property of the .sideNav caused the first post to always be as tall as the menu. But then when you scroll and the affix effect is applied to the nav, this side effect cease and this cause a jump in the list of posts when the first post gets back to intended height.

Here's how the bug looked like:

without scrolling past the affix trigger point: