[UI] Size the detail image modal to the viewport (#13264)

Clicking a detail image opened it at Mantine's default modal width
(about 440 px), so a large image was shown no bigger than the preview.
Open the modal at 90vw and cap the image at 85vh so it fits the window.

Fixes #13252

Co-authored-by: jbc-af <jbc@autofruit.com>
Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/frontend/src/components/details/DetailsImage.tsx

@@ -430,7 +430,8 @@ export function DetailsImage(props: Readonly<DetailImageProps>) {
   const expandImage = (event: any) => {
     cancelEvent(event);
     modals.open({
-      children: <ApiImage src={img} thumbnail={props.thumbnail} />,
+      children: <ApiImage src={img} thumbnail={props.thumbnail} mah='85vh' />,
+      size: '90vw',
       withCloseButton: false
     });
   };