Style Shumate map scales

### Problem

The default shumate map scale style is kinda ugly

### Proposal

```
map-scale {
border-spacing: 1em;
margin: 1em;
}

map-scale label {
background: transparent;
font-size: 0.9em;
font-weight: 700;
text-shadow:
0 2px 5px alpha(black, 0.75),
-1px -1px white,
1px -1px white,
-1px 1px white,
1px 1px white;
border-radius: 0 0 0.25em 0.25em;
padding: 0 0.25rem;
border-color: alpha(#333, 0.75);
box-shadow: 0 1px 1px 0 alpha(white, 0.5);
color: #333;
}
```

### Prior Art (Optional)

_No response_