Word 365: do not announce font attribute toggle messages if raised fr…

…om UIA notification event (#10990)

Fixes #10950

Summary of the issue:
In recent Word 365 releases, NVDA will announce font attribute toggle message up to two times - a message defined by NVDA ,and a second time thanks to UIA notification event.

Description of how this pull request fixes the issue:
Builds on an earlier work on Word 365 UIA notification event suppression (#10851):

Adds a dedicated list in UIA.WordDocument class listing activity ID's NVDA should ignore.
Adds AccSN1, the activity Id for font attribute toggle messages.

source/NVDAObjects/UIA/wordDocument.py

@@ -607,10 +607,15 @@ def event_textChange(self):
 		if not eventHandler.isPendingEvents("caret", self):
 			eventHandler.queueEvent("caret", self)
 
+	suppressedActivityIds = [
+		"AccSN1",  # #10950: font attributes
+		"AccSN2",  # #10851: delete activity ID
+	]
+
 	def event_UIA_notification(self, activityId=None, **kwargs):
-		# #10851: in recent Word 365 releases, UIA notification will cause NVDA to announce edit functions
-		# such as "delete back word" when Control+Backspace is pressed.
-		if activityId == "AccSN2":  # Delete activity ID
+		# In recent Word 365 releases, UIA notification will cause NVDA to announce edit functions
+		# such as "delete back word" when Control+Backspace is pressed or font attributes are toggled.
+		if activityId in self.suppressedActivityIds:
 			return
 		super(WordDocument, self).event_UIA_notification(**kwargs)