gui: Refactor open wallet activity #15478
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This PR changes the thread of the
OpenWalletActivity, from the wallet controller thread to the GUI thread. The actual opening is still executed in the wallet controller thread, but in a different way. Considering the current minimum Qt version, the best way to run a function in a different thread is to useQTimer::singleShot(0, worker, () { ... })whereworkeris an object in a different thread. With Qt 5.10, the correct way is to useQMetaObject::invokeMethod.This change also removes from
bitcoingui.cppthe handling of loading messages and progress dialog.