Homepage sites with no favicons should look less weird with `userContent.newTab.full_icon`

### Is your feature request related to a problem?

Currently, sites with no favicons look kinda weird in the homepage with `userContent.newTab.full_icon`.

The letter isn't centered and it's rotated for some reason.

Without `userContent.newTab.full_icon`, it looks fine.

### The solution I'd like

In Chrome and Edge, the letter is centered and not rotated.

An alternate solution is to make the letter bigger.
(the letter is also slightly transparent)Code

.top-site-outer .tile .icon-wrapper::before {

		translate: 0px 10px;

		font-size: 100px !important;

		opacity: 0.75 !important;

}

### Screenshots or video

_No response_

### Alternatives I've considered

_No response_

### Additional context

Site without favicon: http://example.com

Start by locating the `.top-site-outer .tile .icon-wrapper::before` rule and compare its behavior with and without `userContent.newTab.full_icon`. Adjust the missing-favicon letter styling so it is centered and not rotated, or use the provided larger, slightly transparent alternative; done means sites without favicons no longer look distorted on the homepage.

Written by the indexing model from the issue text.