qt dark style: fix padding of PayToEdit

based on Electron-Cash/Electron-Cash@7e69f0e6ea
see ColinDuquesnoy/QDarkStyleSheet#159

electrum/gui/qt/__init__.py

@@ -56,6 +56,7 @@ from .installwizard import InstallWizard, WalletAlreadyOpenInMemory
 from .util import get_default_language, read_QIcon, ColorScheme
 from .main_window import ElectrumWindow
 from .network_dialog import NetworkDialog
+from .stylesheet_patcher import patch_qt_stylesheet
 
 
 class OpenFileEventFilter(QObject):
@@ -132,6 +133,8 @@ class ElectrumGui(Logger):
             except BaseException as e:
                 use_dark_theme = False
                 self.logger.warning(f'Error setting dark theme: {repr(e)}')
+        # Apply any necessary stylesheet patches
+        patch_qt_stylesheet(use_dark_theme=use_dark_theme)
         # Even if we ourselves don't set the dark theme,
         # the OS/window manager/etc might set *a dark theme*.
         # Hence, try to choose colors accordingly: