[gui] Merged PR from hebasto: qt6: Handle different signatures of `QANEF::nativeEventFilter` https://github.com/bitcoin-core/gui/pull/840 

 [gui] Merged PR from pablomartin4btc: Fix display issues for IPv6 proxy setup in Options Dialog  (UI only, no functionality impact) https://github.com/bitcoin-core/gui/pull/836 

 [gui] Merged PR from hebasto: qt6: Fix linking when configured with `-DENABLE_WALLET=OFF` https://github.com/bitcoin-core/gui/pull/837 

 [gui] Merged PR from hebasto: qt6, test: Handle deprecated code https://github.com/bitcoin-core/gui/pull/839 

 [gui] Merged PR from hebasto: qt6: Handle deprecated `QLocale::nativeCountryName` https://github.com/bitcoin-core/gui/pull/838 

 [gui] Merged PR from furszy: Fix crash when closing wallet https://github.com/bitcoin-core/gui/pull/835