Make overlay sidebars behave like modals #243

Job	Run time
a11y-tests (ubuntu-latest, 3.12)	4m 40s
build PST docs (ubuntu-latest, 3.12)	3m 21s
run-pytest (ubuntu-latest, 3.9)	2m 19s
build PST docs (macos-latest, 3.12)	4m 1s
run-pytest (ubuntu-latest, 3.10)	2m 20s
build PST docs (windows-latest, 3.12)	3m 28s
run-pytest (ubuntu-latest, 3.11)	2m 18s
build PST docs (ubuntu-latest, 3.9, 6.1)	4m 2s
run-pytest (ubuntu-latest, 3.12)	2m 24s
run-pytest (ubuntu-24.04, 3.11)	2m 18s
run-pytest (ubuntu-24.04, 3.12)	2m 18s
run-pytest (macos-14, 3.10)	1s
run-pytest (macos-14, 3.11)	1s
run-pytest (macos-14, 3.12)	1s
run-pytest (macos-13, 3.9)	1s
run-pytest (macos-13, 3.10)	2m 6s
run-pytest (macos-13, 3.11)	2m 7s
run-pytest (macos-13, 3.12)	2m 0s
run-pytest (windows-latest, 3.9)	2m 10s
run-pytest (windows-latest, 3.10)	2m 12s
run-pytest (windows-latest, 3.11)	2m 12s
run-pytest (windows-latest, 3.12)	2m 10s
run-pytest (ubuntu-latest, 3.9, 6.1)	2m 19s
run-pytest (ubuntu-latest, 3.12, dev)	2m 19s
check coverage	0s
lighthouse-audit	3m 55s
profiling	0s
	57m 3s

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