HIFIS Roadmap "Show pst items" year by year
The list of hidden milestones in the (HIFIS Roadmap](https://hifis.net/roadmap/) is getting long and a user has to scroll a lot.
Is it possible to split the button show past items
so that a user can choose if s/he would like to see show 2019
show 2020
show 2021
?
Perhaps the easiest way is to have a button for each year?