Navbar improvements
Use fixed-top for less jumpy behavior. Small layout fixes.
This MR also updates to Bootstrap 5.0.1 to allow for Offcanvas elements (to be used in a follow-up MR).
Use fixed-top for less jumpy behavior. Small layout fixes.
This MR also updates to Bootstrap 5.0.1 to allow for Offcanvas elements (to be used in a follow-up MR).