Translations:New Template System in LS3.x/72/en

Of course, the XML file only contains the default values for your theme configuration. But indeed, those values are defined and read inside the database (table "template_configuration" (Question: "template_" of "theme_"?) as json strings. The option.js file just use the value of the font selector of the simple option to change the value inside the advanced tab form: https://github.com/LimeSurvey/LimeSurvey/blob/70a1d99cd2ebe411597231a8bc746b4ca9e19584/themes/survey/vanilla/options/options.js#L148-L174