Minor changes

[flibber-hk]

Summary of Changes

Some minor changes I thought of while thinking about documentation:

• Allow l10n of dynamic description elements
• Util to create a text button to jump to a page. This doesn't work as intended for the "Mods" button (the menu is generated lazily), or the nested submenu (at least in the test, because the submenu name is not the same as the mod name), which is why I haven't replaced usages. But it does work sometimes (in cases where the menu is generated eagerly).
• Add a virtual method to place elements onto a subpage; the intent here is that people can use the config entry factory to sometimes have scrollable screens and sometimes have paginated screens (this is the one I think is most likely to need review)

[BadMagic100]

Code looks fine, did not test