The changes on the color theme are not taken into account for various ss*x resources

Same issue than https://jira.xwiki.org/browse/XWIKI-18635 but for various URL generated by the $xwiki.ss*x APIs.

Here are some examples you can find in the source of the XWiki Standard home page:

• /xwiki/bin/skin/resources/js/xwiki/widgets/modalPopup.css?cache-version=1619449877258&colorTheme=FlamingoThemes.Iceberg triggered in javascript.vm
• /xwiki/bin/skin/resources/uicomponents/viewers/tags.css?cache-version=1619449877274&colorTheme=FlamingoThemes.Iceberg triggered in documentTags.vm

I'm wondering if we should not either:

• always add the current color theme in the ss*x URLs
• add the current color theme in the ss*x URLs by default but introduce a parameter to disable it for a specific one
• introduce a parameter to disable it for a specific one to enable adding the current color theme in the ss*x URL