ui: set min-width for homework_scoreboard user field

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.34.37",
+  "version": "4.34.38",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/pages/homework_scoreboard.page.styl

@@ -1,10 +1,11 @@
 .page--homework_scoreboard
   .col--rank
-    width: rem(70px)
+    width: rem(60px)
+    text-align: center
     border-right: 1px solid $table-border-color
 
   .col--user
-    width: auto
+    min-width: rem(150px)
 
   .col--total_score, .col--time
     width: rem(100px)