Wider sidebar.

Thanks to vjrj !

Closes #2218

client/components/sidebar/sidebar.styl

@@ -109,7 +109,7 @@
     color: darken(white, 40%)
 
 .board-sidebar
-  width: 248px
+  width: 548px
   right: -@width
   transition: top .1s, right .1s, width .1s