added loggedIn class to main tpl container

[selfthinker]

This is a feature, not a bug fix. And it's in a pull request because it's after feature freeze. But it would be great to have it in the next release anyway.

[selfthinker]

I wonder if it makes sense to introduce something like WordPress's "body_class()", so maybe tpl_template_class()? To have the mode in there makes sense as well, but maybe not the sidebar classes (as some templates might not use them).

[splitbrain]

I'd be fine with merging this, but yes, a Wordpress like class output function could be useful across different templates.

[selfthinker]

I only planned to keep this quick and simple because I had hoped it would make it into the release. Now that it's after the release, I'm fine with adding an appropriate function instead.

[splitbrain]

@selfthinker okay, we're waiting for your function