More refactoring in HtmlFilter::runOn() #587

Job	Run time
Prepare	1s
Build (ubuntu-22.04, 6, own-quotient)	4m 59s
Build (ubuntu-22.04, 6, static)	3m 39s
Build (ubuntu-22.04, 6, dynamic)	3m 50s
Build (ubuntu-22.04, 6, GCC, own-quotient)	8m 28s
Build (ubuntu-22.04, 6, GCC, static)	6m 21s
Build (ubuntu-22.04, 6, GCC, dynamic)	6m 16s
Build (macos-latest, 6, own-quotient)	8m 50s
Build (macos-latest, 6, static)	7m 29s
Build (windows-latest, 6, own-quotient)	7m 45s
Build (windows-latest, 6, static)	6m 30s
Build (ubuntu-22.04, 5, own-quotient, appstream)	3m 47s
Build (ubuntu-22.04, 5, static)	2m 47s
Build (ubuntu-22.04, 5, dynamic, codeql)	5m 55s
Publish (macOS)	49s
Publish (Linux)	50s
Publish (Windows)	2m 49s
	1h 21m 5s

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