increase player panel z index so it is on top of spawn timer (#1488)

## Description:

The spawn timer menu was blocking the exit button of the player panel on
mobile

## 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
- [x] I have read and accepted the CLA aggreement (only required once).

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

evan

src/client/graphics/layers/PlayerPanel.ts

@@ -233,7 +233,7 @@ export class PlayerPanel extends LitElement implements Layer {
 
     return html`
       <div
-        class="fixed inset-0 flex items-center justify-center z-50 pointer-events-none overflow-auto"
+        class="fixed inset-0 flex items-center justify-center z-[1001] pointer-events-none overflow-auto"
         @contextmenu=${(e) => e.preventDefault()}
         @wheel=${(e) => e.stopPropagation()}
       >