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e89f8154 - Fix problems navigating text in Office 2013 Skype for Business on Windows 7. (PR #7139, issue #7124)

Fix problems navigating text in Office 2013 Skype for Business on Windows 7. (PR #7139, issue #7124) UIAUtils.UIATextRangeAttributeValueFetcher.getValue: catch COMError if the attribute is not supported and return UIA's reservedNotSupportedValue as expected.