Wait for events to load before saving scroll position

src/js/timeline.js

@@ -373,7 +373,6 @@ class Timeline extends Subscribable {
 	}
 
 	async loadScrollback() {
-		this.broadcast("beforeScrollbackLoad")
 		debug = true
 		if (!this.from) throw new Error("Can't load scrollback, no from token")
 		const url = new URL(`${lsm.get("domain")}/_matrix/client/r0/rooms/${this.id}/messages`)
@@ -385,7 +384,11 @@ class Timeline extends Subscribable {
 			lazy_load_members: true
 		}
 		url.searchParams.set("filter", JSON.stringify(filter))
+
 		const root = await fetch(url.toString()).then(res => res.json())
+
+		this.broadcast("beforeScrollbackLoad")
+
 		this.from = root.end
 		//console.log(this.updateEvents, root.chunk)
 		if (root.state) this.updateStateEvents(root.state)