Fixed nvaccess#860

This commit fixes nvaccess#860 by checking the "Formula" IAccessible2 attribute exposed by Lotus Symphany based spreadsheet applications and adding the STATE_HASFORMULA where needed.

source/appModules/soffice.py

@@ -10,6 +10,7 @@
 import controlTypes
 import textInfos
 import colors
+import tones
 from compoundDocuments import CompoundDocument
 from NVDAObjects.JAB import JAB, JABTextInfo
 from NVDAObjects.IAccessible import IAccessible, IA2TextTextInfo
@@ -220,6 +221,8 @@ def _get_states(self):
 			# #8988: Cells in Libre Office do not have the selected state when a single cell is selected (i.e. has focus).
 			# Since #8898, the negative selected state is announced for table cells with the selectable state.
 			states.add(controlTypes.STATE_SELECTED)
+		if 'Formula' in self.IA2Attributes and self.IA2Attributes['Formula']:
+			states.add(controlTypes.STATE_HASFORMULA)
 		return states
 
 class SymphonyTable(IAccessible):