Instantiate set status modal directly from sidebar

What does this MR do and why?

Now that we do not have the legcay nav any longer, we can instantiate the set-status modal directly from the sidebar, rather than writing some properties to a div, which is later read by some other code.

Screenshots or screen recordings

Before	After
Screen_Recording_2023-11-20_at_09.35.20	Screen_Recording_2023-11-20_at_09.33.46

How to set up and validate locally

1. Log into the GDK
2. Open the Set Status Modal via the user menu

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.