Allow filtering the list of open source projects by your favourite languages

[fran496]

I wish when I click the dropdown list to filter the list of projects by language there was a category to filter by my user's favourite languages.

And even better idea would be to have a single button aside the list. This button selects the user's favourite languages on the dropdown list. Why is a button a better idea? is faster to identify and it's function it's isolated from the dropdown list.