fa5362a9a0 rpc: Add missing BlockUntilSyncedToCurrentChain to wallet RPCs (MarcoFalke)
Pull request description:
Wallet RPCs that allow a rescan based on block-timestamp or block-height
need to sync with the active chain first, because the user might assume
the wallet is up-to-date with the latest block they got reported via a
blockchain RPC.
ACKs for top commit:
meshcollider:
utACK fa5362a9a0
Tree-SHA512: d4831f1f08f854f9a49fc969de86c438f856e41c2163c801a6ff36dc2f6299cb342b44663279c524a8b7ca9a50895db1243cd7d49bed79277ada857213f20a26