During rolling forward in `ReplayBlocks()` the UI progress starts with 0 then, once sync up again, jumps to 100%. This process can take pretty long and it would be good to show some progress steps within the RollingForwardBlock loop (`for (int nHeight = nForkHeight + 1; nHeight <= pindexNew->nHeight; ++nHeight) {`)
}
        {
            LOCK(cs_main);
            CBlockIndex* starting_tip = chainActive.Tip();
            bool blocks_connected = false;
            do {
                
                
                ConnectTrace connectTrace(mempool); 
                if (pindexMostWork == nullptr) {
                    pindexMostWork = FindMostWorkChain();
                }
                
                if (pindexMostWork == nullptr || pindexMostWork == chainActive.Tip()) {
                    break;
                }
                bool fInvalidFound = false;
                std::shared_ptr<const CBlock> nullBlockPtr;
                if (!ActivateBestChainStep(state, chainparams, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : nullBlockPtr, fInvalidFound, connectTrace))
                    return false;
                blocks_connected = true;
                if (fInvalidFound) {
                    
                    pindexMostWork = nullptr;
                }
                pindexNewTip = chainActive.Tip();
                for (const PerBlockConnectTrace& trace : connectTrace.GetBlocksConnected()) {
                    assert(trace.pblock && trace.pindex);
                    GetMainSignals().BlockConnected(trace.pblock, trace.pindex, trace.conflictedTxs);
                }