Add <a> title attribute to os selector

[RiccardoMasutti]

Meta title tags are a major factor in helping search engines understand what pages are about. Title tags are used in three key places:

• search engine results pages (SERPs)
• web browsers
• social networks.

[m52go]

@RiccardoMasutti did we discuss priority or budget for #350, #349, #348, and #347?

[RiccardoMasutti]

@m52go no we didn't.
I proposed those changes without defining the budget because they are all low-budget changes; I thought I'd discuss it with you once all the PRs were added

[m52go]

With your request history, I'm not sure what "low-budget" means. Also it takes time and and effort for reviewers to review, and your past PRs have taken lots of time to review and fix, so your time and budget is not the only consideration.

Above all, this isn't the general workflow in place for growth. Compensation and priority must be determined before making pull requests. Specifically for you, we decided you'd make issues before making any pull requests—right?

I would have rejected the notion of making these changes if you had run them by me beforehand, so I'm rejecting them here.