Fix for extended languages
Fix for extended languages

Some TinyMCE language file has a name with locale code (ex 'zh-cn.js').
Let's support it

avdevs/concrete5,TimDix/concrete5,TimDix/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,matt9mg/concrete5,avdevs/concrete5,TimDix/concrete5,MichaelMaar/concrete5,avdevs/concrete5,MichaelMaar/concrete5,matt9mg/concrete5