Hide cursor while dragging number inputs in Safari to approximate PointerLock, and disable it on desktop (#3425)

* Make pointerlock conditional and opt out on Safari and desktop

* Add Safari workaround

frontend/src/utility-functions/platform.ts

@@ -1,3 +1,5 @@
+import { isPlatformNative } from "@graphite/../wasm/pkg/graphite_wasm.js";
+
 export function browserVersion(): string {
 	const agent = window.navigator.userAgent;
 	let match = agent.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
@@ -37,6 +39,10 @@ export function operatingSystem(): OperatingSystem {
 	return osTable[userAgentOS || "Unknown"];
 }
 
+export function isDesktop(): boolean {
+	return isPlatformNative();
+}
+
 export function isEventSupported(eventName: string) {
 	const onEventName = `on${eventName}`;