Hi! I'd like to request the ability to customize the PWA manifest.json, specifically the background_color and theme_color fields, so that the splash screen color can be controlled by app creators. Currently, Base44 manages its own version of the manifest and doesn't allow reliable customization of these values. This means we have no way to match the splash screen color to our app's branding. This would be a great addition for anyone building branded PWA apps on Base44. Thank you!