UI refinements (#2859)

## Description:

UI Refinements requested by @evanpelle  check https://ui.openfront.dev

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

src/client/HelpModal.ts

@@ -98,7 +98,7 @@ export class HelpModal extends BaseModal {
     const content = html`
       <div
         class="h-full flex flex-col ${this.inline
-          ? "bg-black/40 backdrop-blur-md rounded-2xl border border-white/10 p-6"
+          ? "bg-black/60 backdrop-blur-md rounded-2xl border border-white/10 p-6"
           : ""}"
       >
         <div class="flex items-center mb-6 pb-2 border-b border-white/10 gap-2">