Merge #17908: qt: Remove QFont warnings with QT_QPA_PLATFORM=minimal

1122817c194ed49abf896e68604e725c3b5c8569 qt: Remove QFont warnings with QPA=minimal (Hennadii Stepanov)

Pull request description:

  This PR removes massive warnings like:
  ```
  QWARN  : ... QFont::setPointSizeF: Point size <= 0 (...), must be greater than 0
  ```

  from `test_bitcoin-qt` output.

  On master (e258ce792a4849927a6db51786732d71cbbb65fc):
  ```
  $ ./src/qt/test/test_bitcoin-qt | grep QFont | wc -l
  ~BitcoinApplication : Stopping thread
  ~BitcoinApplication : Stopped thread
  57
  ```

  With this PR:
  ```
  $ ./src/qt/test/test_bitcoin-qt | grep QFont | wc -l
  ~BitcoinApplication : Stopping thread
  ~BitcoinApplication : Stopped thread
  0
  ```

ACKs for top commit:
  promag:
    Code review ACK 1122817c194ed49abf896e68604e725c3b5c8569.
  jonasschnelli:
    utACK 1122817c194ed49abf896e68604e725c3b5c8569

Tree-SHA512: 32fa72a5d3db1d4c73a2a324aa9cad807ee46f23fc5319f7d71202987dc73ea7c90082904489b323a432e1afaebd9976b7dd0374236a16153162aa75fe368723

1 files changed, 8 insertions, 0 deletions

diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 8b9fca4fb1..a26e7ff873 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -28,9 +28,12 @@ namespace interfaces
 
 QT_BEGIN_NAMESPACE
 class QAbstractItemView;
+class QAction;
 class QDateTime;
 class QFont;
 class QLineEdit;
+class QMenu;
+class QPoint;
 class QProgressDialog;
 class QUrl;
 class QWidget;
@@ -273,6 +276,11 @@ namespace GUIUtil
      * Writes to debug.log short info about the used Qt and the host system.
      */
     void LogQtInfo();
+
+    /**
+     * Call QMenu::popup() only on supported QT_QPA_PLATFORM.
+     */
+    void PopupMenu(QMenu* menu, const QPoint& point, QAction* at_action = nullptr);
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H