Tabbar: Add properties to make component more flexible

[chrislueders]

As a user it would be easier to customize the amount of shown tabs, if we could disable and enable the visibility of tabs in the properties panel. (See my idea in the image)

Additionally to that, it would be easier to find the right tab, after one customized the purpose of a tab. Example: One changed the "Home" tab to "Transactions", it would be weird if the Tab would still be named "Home".