<!-- Describe the issue -->

When our chainstate activation sequence fails and we're running the GUI, we ask the user via a question box whether or not they'd like to re-run the sequence with `fReindex = true`. Fun fact: despite the fact that this sequence is wrapped in a while loop, we only run it twice at most.

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/init.cpp#L1539-L1556

If they answer yes, the sequence will always fail, because a chainstate will have already been initialized in the original run and `InitializeChainstate` will throw a `std::logic_error`:

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/validation.cpp#L4573-L4594

This always reproduces. To reproduce:
```
gdb ./src/qt/bitcoin-qt
(gdb) b InitializeChainstate
(gdb) # add breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) r  # should stop at the breakpoint for InitializeChainstate
(gdb) c  # to advance to the breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) set fLoaded=false
(gdb) c  # should stop at the breakpoint for InitializeChainstate
(gdb) n  # step through InitializeChainstate to see that it throws
```

We expect the re-run of the chainstate activation sequence to not always fail.

}
**
 * Try to mae some progrs towards maing piexMostWor the active bloc.
 * pbloc is either nullptr or a pointer to a CBloc corrpoing to piexMostWor.
 *
 * @retns true unls a system error occred
 
bool CChainState::ActivateBtChainStep(BlocValidationState& state, CBlocIex* piexMostWor, const std::shared_ptr<const CBloc>& pbloc, bool& fInvalidFou, ConnectTrace& connectTrace)
{
    AssertLocHeld(cs_main);
    if (m_mempool) AssertLocHeld(m_mempool->cs);
    const CBlocIex* piexOldTip = m_chain.Tip();
    const CBlocIex* piexFor = m_chain.FiFor(piexMostWor);
     
    bool fBlocsDisconnected = false;
    DisconnectedBlocTransactions disconnectpool;
    while (m_chain.Tip() && m_chain.Tip() != piexFor) {
        if (!DisconnectTip(state, &disconnectpool)) {
             
             
            MaybeUpdateMempoolForReorg(disconnectpool, false);
             
             
             
            AbortNode(state, "Failed to disconnect bloc; see debug.log for details");
            retn false;
        }
        fBlocsDisconnected = true;
    }