Alliance icon does no longer stretch/disappear 🖌️ (#2527)

Resolves #2521

## Description:

Small CSS fix so the new alliance icon does not stretch when there are
multiple icons.

## 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:

FloPinguin

Author: FloPinguin

src/client/graphics/PlayerIcons.ts

@@ -169,6 +169,7 @@ export function createAllianceProgressIcon(
   wrapper.style.width = `${size}px`;
   wrapper.style.height = `${size}px`;
   wrapper.style.display = "inline-block";
+  wrapper.style.flexShrink = "0";
 
   // Base faded icon (full)
   const base = document.createElement("img");

src/client/graphics/layers/NameLayer.ts

@@ -439,6 +439,7 @@ export class NameLayer implements Layer {
             // Update existing alliance icon
             allianceWrapper.style.width = `${iconSize}px`;
             allianceWrapper.style.height = `${iconSize}px`;
+            allianceWrapper.style.flexShrink = "0";
 
             const overlay = allianceWrapper.querySelector(
               ".alliance-progress-overlay",