@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 
{
        auto locked_chain = m_wallet.chain().lock();
        LOCK(m_wallet.cs_wallet);
        auto mi = m_wallet.mapWallet.find(txid);
        if (mi != m_wallet.mapWallet.end()) {
            return MakeWalletTx(*locked_chain, m_wallet, mi->second);
        }
        return {};
    }
    std::vector<WalletTx> getWalletTxs() override
    {
        auto locked_chain = m_wallet.chain().lock();
        LOCK(m_wallet.cs_wallet);
        std::vector<WalletTx> result;
        result.reserve(m_wallet.mapWallet.size());
        for (const auto& entry : m_wallet.mapWallet) {
            result.emplace_back(MakeWalletTx(*locked_chain, m_wallet, entry.second));
        }
        return result;
    }
    bool tryGetTxStatus(const uint256& txid,