A month pager showing all months in a year

OK, I think I managed to extend the module myself.
It works fine at my installation. It provides an alternative pager, listing all the months at a line at the top. With previous and next year in each end. Pointing to the same month the year before/after.

Hopefully this might be included in the module itself. Otherwise, it might be a basis for a small independent module enhancing the excellent calendar_view module.

Please advise if I should have approached this differently.

"A month pager showing all months in a year" is what i want @oasweb.
Please, could you integrate your multiple patches into one, or even better into a merge request → ? So i may also help making the functionality ready for the road.