@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 
#include <wallet/coincontrol.h>
#include <consensus/consensus.h>
#include <consensus/validation.h>
#include <fs.h>
#include <interfaces/chain.h>
#include <key.h>
#include <key_io.h>
#include <keystore.h>
#include <validation.h>
#include <net.h>
#include <policy/fees.h>
#include <policy/policy.h>
#include <policy/rbf.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <script/descriptor.h>
#include <script/script.h>
#include <shutdown.h>
#include <timedata.h>
#include <txmempool.h>
#include <util/moneystr.h>
#include <wallet/fees.h>
#include <algorithm>
#include <assert.h>
#include <future>
#include <boost/algorithm/string/replace.hpp>
static const size_t OUTPUT_GROUP_MAX_ENTRIES = 10;
static CCriticalSection cs_wallets;
static std::vector<std::shared_ptr<CWallet>> vpwallets GUARDED_BY(cs_wallets);
bool AddWallet(const std::shared_ptr<CWallet>& wallet)