Pressing TAB perm deletes text

When you type some code in this window when you're creating a new topic/message:

Example code {
	// Does something
}

If you highlight the code and press TAB or SHIFT TAB, thinking it might indent your code like it does in any good text editor, you'll quickly find out that not only does it not work, and not only does it replace all your selected code with a TAB, but it also erases the ability to undo (CTRL + Z). :o So by pressing TAB, it pretty much permanently deletes all the code you wrote without any way to restore it. It might be nice to fix that. Thanks.