Update nav sidebar use height variables for fixed position
What does this MR do and why?
!114984 (merged) introduces new $calc-application-header-height, $calc-application-footer-height, and $calc-application-viewport-height variables which use calc() to calculate heights based on the conditional presence of system header, system footer, performance bar, and header.
These changes apply $calc-application-header-height and $calc-application-footer-height to the fixed nav-sidebar.
Screenshots or screen recordings
| Variant | Screenshot |
|---|---|
| All |  |
| Sticky header |  |
| Sticky footer |  |
| Performance bar |  |
| None |  |
How to set up and validate locally
- Enable system header/footer messages in admin settings
- Toggle the performance bar with p + b
- Visit any page with nav-sidebar
- Ensure
top/bottomposition is correct
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #403579 (closed)