Fixed URL address text padding when urlbar is in focus but not open.

[HomemadeToast57]

Describe the bug
The vertical padding (specifically top padding) of the URL address text is incorrect within its container when you open or switch to a new tab and have focus on the search bar.

To Reproduce
Steps to reproduce the behavior:

1. Install MaterialFox chrome folder and user.js to profile root directory
2. Restart Firefox
3. Open new tab or click on address bar -> switch tabs -> return back to original tab (make sure you are not in the focus mode where it shows you autocomplete suggestions list)

Screenshot BEFORE fix
Look at the URL text inside the address bar...

System info

• OS: MacOS
• Firefox version: 103.0b9

How I fixed it
On line #208 in chrome/urlbar/urlbar.css, I separated the horizontal and vertical padding values for the URL address text within the address bar. I noticed that it was setting ALL padding (every direction) to 0 but the desired styling was 0 padding for the horizontal directions (left and right) and automatic (evenly spaced) padding for the vertical directions (top and bottom). Below is the line of code I changed:

from
	padding: 0 !important;
to
	padding: 0 auto !important;

Screenshot AFTER fix
Look at the URL text inside the address bar...

Hope this helps!

[HomemadeToast57]

(Connecting this PR to original issue)
This fixes #324.