messagelist: use lockedQueuedEffect

[link2xt]

This is an attempt to get rid of messages like lockedEffect: fetchMoreMessagesBottom: We're locked, dropping effect which started appearing after deltachat/deltachat-core-rust#4341

[link2xt]

I am replacing this.scheduler.queuedEffect(this.scheduler.lockedEffect( with this.scheduler.lockedQueuedEffect( here, but am not familiar with what is happening inside. The comment here suggests using lockedQueuedEffect, this is why I am doing it:

deltachat-desktop/src/renderer/stores/chat/chat_scheduler.ts

Lines 30 to 32 in 45c8343

	/** This effect will only get executed if the lock is unlocked. If it's still locked, this effect
	* will get dropped/not executed. If you want the effect to get executed as soon as the lock with
	* lockNameis unlocked, use lockedQueuedEffect.*/

[link2xt]

It seems messages are now marked as seen reliably when I select the chat, but I did no proper testing.