fix(pdf-viewer): loader container blocks other elements on the page #3876

Job	Run time
Status check > Unit	1s
CI \| Unit	1s
CI \| Visual	1s
Compile themes / run	38s
Lint scripts / run	50s
Lint styles / run (default)	2m 43s
Lint styles / run (bootstrap)	2m 45s
Render test pages / verify	11s
Lint styles / run (material)	2m 52s
Lint styles / run (classic)	2m 49s
Lint styles / run (nouvelle)	57s
Lint styles / run (fluent)	49s
Render test pages / run	0s
Status check > A11y / prepare	1s
Create screenshots / run (default)	2m 27s
Create screenshots / run (bootstrap)	2m 29s
Create screenshots / run (material)	2m 37s
Create screenshots / run (classic)	2m 19s
Create screenshots / run (nouvelle)	2m 3s
Create screenshots / run (fluent)	2m 8s
Status check > A11y / run-checks (1)	2m 40s
Status check > A11y / run-checks (2)	2m 27s
Status check > A11y / run-checks (3)	2m 17s
Status check > A11y / run-checks (4)	2m 30s
Status check > Lint scripts	1s
Status check > Lint styles	1s
Detect changes	17s
Status check > Visual	1s
	38m 55s

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