Improvements in the fonts editing

From now on, you can open font settings for a specific type of text on the site not only in the "Site styles" settings but also simply when editing a particular text by clicking on the "gear" in the list of text types. Changes made in these settings, as before, will be applied to all texts with the selected type ("Block title", "Subheading", "Text", etc.).

Besides, we have adapted the font settings for the site's mobile version to make editing the font separately for smartphone display even more convenient.