* fix(explorer): vertically center the Explorer toggle under mobile view
* Added a separate title font configuration
* Added googleSubFontHref function
* Applied --titleFont to PageTitle
* Made googleFontHref return array of URLs
* Dealing with empty and undefined title
* Minor update
* Dealing with empty and undefined title
* Refined font inclusion logic
* Adopted the googleFontHref + googleFontSubsetHref method
* Adaptively include font subset for PageTitle
* Restored default config
* Minor changes on configuration docs
* Formatted source code
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