Use a smaller font to display the filename

More information regarding the file!

frontend/ui/widget/filechooser.lua

@@ -4,6 +4,7 @@ local Menu = require("ui/widget/menu")
 local Screen = require("device").screen
 local Device = require("device")
 local DocSettings = require("docsettings")
+local Font = require("ui/font")
 local util = require("ffi/util")
 local _ = require("gettext")
 local ffi = require("ffi")
@@ -22,6 +23,7 @@ local function kobostrcoll(str1, str2)
 end
 
 local FileChooser = Menu:extend{
+    cface = Font:getFace("cfont", 21),
     no_title = true,
     path = lfs.currentdir(),
     parent = nil,