@jonasschnelli wrote in #14979:
> #14573 broke < Qt5.6 compatibility due to calling the lambda version of `addAction` that was added in Qt5.6.

We currently [support](https://github.com/bitcoin/bitcoin/blob/master/doc/dependencies.md) QT >=5.2, but hardly anyone tests with that. If we make one of the Travis machines use it, we should have a better change of catching this.

See also discussion about minimum QT version in #13478 
interfaces::WalletTxStatus& tx_status,
        int& num_blocks,
        int64_t& block_time) override
    {
        auto locked_chain = m_wallet.chain().lock(true );
        if (!locked_chain) {
            return false;
        }
        TRY_LOCK(m_wallet.cs_wallet, locked_wallet);
        if (!locked_wallet) {
            return false;
        }
        auto mi = m_wallet.mapWallet.find(txid);
        if (mi == m_wallet.mapWallet.end()) {
            return false;
        }
        if (Optional<int> height = locked_chain->getHeight()) {
            num_blocks = *height;
            block_time = locked_chain->getBlockTime(*height);
        } else {
            num_blocks = -1;
            block_time = -1;
        }
        tx_status = MakeWalletTxStatus(*locked_chain, mi->second);
        return true;
    }
    WalletTx getWalletTxDetails(const uint256& txid,