Make icon width match other areas

This was 8 but we've seen areas where this was 14, like the project search tab icon. We want to match this.

Co-Authored-By: Julia <30666851+ForLoveOfCats@users.noreply.github.com>

styles/src/styleTree/tabBar.ts

@@ -24,7 +24,7 @@ export default function tabBar(colorScheme: ColorScheme) {
     spacing: 8,
 
     // Close icons
-    iconWidth: 8,
+    iconWidth: 14,
     iconClose: foreground(layer, "variant"),
     iconCloseActive: foreground(layer, "hovered"),