Revert: Update dependency ReactiveUI.WPF to v23 (#5328) #8937

Job	Run time
containers / servicecontrol	2m 2s
windows-installers / build	6m 17s
containers / servicecontrol-monitoring	1m 50s
db-container / db-container	47s
containers / servicecontrol-audit	2m 14s
Windows-RabbitMQ	11m 33s
Linux-Default	11m 3s
Windows-Default	13m 54s
Windows-SqlServer	8m 30s
Linux-SqlServer	4m 6s
Linux-SQS	4m 5s
Windows-AzureServiceBus	11m 30s
Windows-AzureStorageQueues	5m 45s
Windows-SQS	5m 46s
Linux-PrimaryRavenPersistence	4m 10s
Windows-PrimaryRavenPersistence	7m 4s
Linux-AzureServiceBus	9m 31s
Windows-PrimaryRavenAcceptance	14m 3s
Linux-IBMMQ	3m 49s
Windows-MSMQ	4m 51s
Windows-PostgreSQL	8m 19s
Linux-RabbitMQ	8m 13s
Linux-AzureStorageQueues	4m 51s
Linux-PostgreSQL	5m 20s
Linux-PrimaryRavenAcceptance	10m 32s
container-test / asb	2m 50s
container-test / asq	2m 15s
container-test / sqs	1m 57s
container-test / postgresql	1m 42s
container-test / rabbit	1m 35s
container-test / mssql	1m 42s
	3h 2m 6s

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