Signal ChainTip in ConnectTip and DisconnectTip methods
Signal ChainTip in ConnectTip and DisconnectTip methods

Do not try to update tree anchor and witnesses if sapling is not active

Validation: Adapted the cached incremental witnesses update flow to the syncTransaction changes.

The witness update must be after the SyncTransaction signal.

Darknet-Crypto/Darknet,Darknet-Crypto/Darknet,PIVX-Project/PIVX,PIVX-Project/PIVX,Darknet-Crypto/Darknet,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,PIVX-Project/PIVX,Darknet-Crypto/Darknet,Darknet-Crypto/Darknet,PIVX-Project/PIVX,Darknet-Crypto/Darknet,PIVX-Project/PIVX,PIVX-Project/PIVX