Fix for physics tab still selected even though it is disabled

Code looks good, however I am not convinced about the usability gain.
For example: If you're clicking through elements to compare physics attributes and you hit something where the tab is not available tab switches, clicking something with physics tab will leave you at the first tab. Now you have to switch tabs again.
I'd rather have all tabs available and add a little label saying NA or something alike, but that's not up to me to decide.
@vlidholt What do you think?