Apply what language was chosen on the code tabs across user navigation #135

Imagine you're a Java developer and you're checking different code snippets using those tabs we provided.

Then you select "Java" and continues to navigate. If you're checking other snippets, then you have to choose Java over and over again. If you go to another page and navigate back, you'll also have to select the option you wanted again.

It would be SUPER awesome if we could do two things:

1. When the user chooses a language we apply to all code snippets on the page.
2. Then we save on localStorage and during navigation we could fetch that data and select it for the user.