Make sure that the board header buttons fit into one line

...even for devices with 360px width resolution.

client/components/main/header.styl

@@ -175,7 +175,7 @@
       .board-header-btn
         height: 32px
         line-height: @height
-        font-size: 16px
+        font-size: 15px
 
         i.fa
           line-height: 32px