e82a2ce9ae
This PR introduces a new hidden site setting that allows admins to display a splash screen while site assets load. The splash screen can be enabled via the `splash_screen` hidden site setting. This is what the splash screen currently looks like https://d11a6trkgmumsb.cloudfront.net/original/4X/5/c/e/5ceb72f0853a111469ca08a61328b01b39806d47.mp4 Once site assets load, the splash screen is automatically removed. To control the loading text that shows in the splash screen, you can change the preloader_text translation string in admin > customize > text