Roadmap's "Date Range" setting is volatile

Every time I set the "date range" option in the Roadmap settings, it gets lost after a page refresh. This bug is so annoying, it makes the Roadmap feature almost completely unusable.

Steps to reproduce

1. open Roadmap view
2. select any date range other from the default (default is This quarter)
3. refresh page

Expected behavior

GitLab remembers my "date range" preference.

Actual behavior

GitLab selects the This quater date range every time I refresh the page.