Improve theme on small window

[gigglylo]

firstly, thanks for this awesome theme, it looks good on my desktop.

secondly, i want to open a small issue on this theme.
as the tittle explains, the close button is overlapping with other button next to it. this happens when i resize the firefox window to the smallest size.

i played around with placement of the button on Tweaks app, it seems like if we put the close button on the right, it doesn't overlap (but other buttons are hidden)

[rafaelmardojai]

Yeah, i have noticed this too.

As you can see in the screenshot below, comparing default vs themed Firefox, we have a space problem.

This problem is mainly caused by Adwaita big margins/paddings and the windows buttons merged in the navbar. For example the thing is worse for someone with the three buttons enabled:

A perfect solution would be what was proposed in #131, but it's an impossible task to do with just CSS.

So I'm open to suggestions on what to do to make this theme friendlier to small windows.

[rafaelmardojai]

Hey @mgueji, feel free to point there anything that can help us to fix this issue.