Smaller height for Add Board button.

Thanks to xet7 !

client/components/boards/boardsList.styl

@@ -69,7 +69,7 @@ $spaceBetweenTiles = 16px
 
     .label
       font-weight: normal
-      line-height:90px
+      line-height: 56px
 
     :hover
       background-color:#939393