fix: Prevent gallery auto-scrolling from scrolling entire browser (#1824)

- Closes #1814

src/utils/scroll.ts

@@ -0,0 +1,13 @@
+import { compute as computeScroll, Options } from 'compute-scroll-into-view';
+
+// Alternative to the stock element.scrollIntoView that suppports limiting
+// scrolling to a boundary, rather than the entire browser root.
+//
+// See: https://github.com/dermotduffy/frigate-hass-card/issues/1814
+// See: https://github.com/w3c/csswg-drafts/issues/9452
+export const scrollIntoView = (element: HTMLElement, options: Options) => {
+  computeScroll(element, options).forEach(({ el, top, left }) => {
+    el.scrollTop = top;
+    el.scrollLeft = left;
+  });
+};