tinymce default font size

每次換 tinymce 都要改，每次都要 google，放在這邊下次可以參考

tinymce/jscripts/tiny_mce/themes/advanced/skins/default/content.css

body, td, pre {color:#000; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:14px; margin:8px;}