Add configurable banner title to the initial screen.

Patch above IS working, however setting to needs work as it should be improved.

Thanks @joseph.olstad this indeed looks a bit hacky. The real solution would be to replace the react banner by an open source one (propably vue or svelte, there's an issue for that) so it can be modified.

Setting the status here to postponed, but should be "won't fix" in real. Still anyone who needs this, can use the patch. Thank you :)

Fix for translations, use cookiesjsr.translation.bannerText not cookieTexts.bannerText

Eventually fixable in 2.x?