md-content should slide as sidebar comes into view

[alexlafroscia]

When the sidebar comes into view based on the browser width increasing past a certain point, the md-content element should transition gradually with the sidebar instead of "jumping" to the other position and leaving a blank space that the sidebar then fills. That's how the Material Angular site does it, anyway, and it looks/feels a lot nicer. I'm happy to fix this if you want it fixed.

[miguelcobain]

Yes, angular material also animates width. This is an edge use case (since it only happens when we resize the viewport), but it should also be addressed.

[miguelcobain]

This was fixed a long time ago on later versions.