Transition and Loading Screens Not Conforming to Themes Or Styles

When clicking between Pages (formerly known as views), there is a brief blank white loading page with a spinning blue circle appearing before the next page loads. Even if you set your floor plan style sheets, SVG backgrounds, and themes all to black, this screen is still a bright white panel.

Anyone know where this loading page’s styles are stored so we can edit them?

It’s not a huge deal, but it kind of ruins the experience after spending lots of time customizing all the interfaces.