Add dismiss all alerts and delete all messages buttons.

[ArneBab]

No description provided.

[Bombe]

(Sorry for shaving this yak, feel free to ignore, but if you don’t ignore it, make sure I got it right, negations are confusing. 😄)

Suggested change

	for (UserAlert alert : ctx.getAlertManager().getAlerts()) {
	if (!alert.userCanDismiss()) {
	continue;
	}
	if (alert instanceof NodeToNodeMessageUserAlert) {
	continue; // keep all node to node messages
	}
	ctx.getAlertManager().dismissAlert(alert.hashCode());
	}
	Arrays.stream(ctx.getAlertManager().getAlerts())
	.filter(UserAlert::userCanDismiss)
	.filter(alert -> !(alert instanceof NodeToNodeMessageUserAlert))
	.map(Object::hashCode)
	.forEach(ctx.getAlertManager()::dismissAlert);

[Bombe]

(More yak shaving.)

Suggested change

	for (UserAlert alert : ctx.getAlertManager().getAlerts()) {
	if (!(alert instanceof NodeToNodeMessageUserAlert)) {
	continue;
	}
	if (alert instanceof AbstractNodeToNodeFileOfferUserAlert) {
	continue; // not deleting file offers, because these need a decision
	}
	if (!alert.userCanDismiss()) {
	continue;
	}
	ctx.getAlertManager().dismissAlert(alert.hashCode());
	}
	Arrays.stream(ctx.getAlertManager().getAlerts())
	.filter(NodeToNodeMessageUserAlert.class::isInstance)
	.filter(alert -> !(alert instanceof AbstractNodeToNodeFileOfferUserAlert))
	.filter(UserAlert::userCanDismiss)
	.map(Object::hashCode)
	.forEach(ctx.getAlertManager()::dismissAlert);