Fix: Shift handling when deleting from Sent

Due to the way Qt.KeyboardModifiers works, treating it as an integer results in
unexpected behaviour. As a result, When deleting from Sent, it always deleted
rather than moved an item to trash, when selecting "Move to Trash" from the
context menu. This fixes it.

Author: PeterSurda

src/bitmessageqt/__init__.py

@@ -3258,7 +3258,7 @@ def on_action_SentTrash(self):
         if not tableWidget:
             return
         folder = self.getCurrentFolder()
-        shifted = (QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ShiftModifier) > 0
+        shifted = QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ShiftModifier
         while tableWidget.selectedIndexes() != []:
             currentRow = tableWidget.selectedIndexes()[0].row()
             ackdataToTrash = str(tableWidget.item(