Improve Tabs

[LichtHund]

The current system for tabs is not great. The syntax is confusing being the following:

-+-  -> Tabs block opener

+Tab Name+ -> Inner tab block opener with the tab name

           -> Content goes inside the tab block

+++        -> Inner tab block closer 

-+- -> Tabs block closer

The syntax itself isn't terrible, but it definitely could be better.
There are some big issues though:

• Can't have tabs inside other tabs
• The symbols are very confusing
• When it becomes too big it'll get very messy

Next iteration of tabs should address this, but for now it's fine.