Fix preview bar on mobile

Fixes #1947 and #1943

src/utils/mobileUtils.ts

@@ -0,0 +1,9 @@
+export function isMobileControlsOpen(): boolean {
+    const overlay = document.getElementById("player-control-overlay");
+
+    if (overlay) {
+        return !!overlay?.classList?.contains("fadein");
+    }
+
+    return false;
+}