Running Settings on maximized window makes hard to see "Advanced Settings" button

## Describe the bug
This is a general design issue that we can reproduce in more components.

### Running on a "small" window

Running on a "small" window the "Turn-Off" switch seems to belong to the "Connection", although the "distance feels wrong";

The "Advanced Settings" that are actually the "Current Connection" details, so they aren't really advanced (and they are the only settings anyway), feels like is something entirely separated

### Running on a maximized window

That's the original issue I'm opening this bug report; I usually run the window on maximized, and so when I went to Network Panel, I didn't even see the "Advanced Settings", and I was searching how I'm supposed to edit my connection

Apart that "Advanced Settings" button is aligned on bottom, that we may miss to look, because it isn't an "expected placement", the visuals of this button makes it hard to distinguish/notice: "Small Grey Box" on a huge "Grey Space"