Since there's no way you can administer TinyMCE in LifeType, you'll have to go and fix your settings in TinyMCE folder and a file called tiny_mce-plog.js. There you can delete some lines of code and choose what features you should offer your users and so forth. I removed all unneccessary functions and moved them all to one line. It looks more nicer and makes it more user friendly.