(sidenav) elements with `position: fixed` inside `md-sidenav-layout`

Because of transform: translate3d(0, 0, 0) on md-sidenav-layout any element with position: fixed inside it will act as if it had position: absolute or static instead. It’s an expected behaviour, but it’s annoying nevertheless.

Could we either remove that transform from md-sidenav-layout(it’s only there because of performance I suppose), or add more examples to Portal and mention it as a workaround in docs, since portal could probably solve this by basically putting the element that needs to be fixed next to the md-sidenav-layout in the dom tree.

cc @hansl @jelbourn

[cortopy]

In my opinion this is a bug insofar as it is the equivalent of putting a ban on fixed elements. I am now trying to create a fab button on the bottom right corner of the screen. Because of this issue I’m unable to do so unless I use solution provided by @fxck

[sterlingfs]

pretty please remove transform: translate3d from the .md-sidenav-content class?