Link to issue number:

None

Summary of the issue:

We included code to add backwards compatibility for addons for the following deprecated wxPython constants wx.CENTER_ON_SCREEN = wx.CENTRE_ON_SCREEN when used with Dialog.Center()

Description of how this pull request fixes the issue:

Remove the deprecated code, and it's only usage in AskAllowUsageStatsDialog, replace with self.CentreOnScreen()

Testing strategy:

Search code for usages of CENTRE_ON_SCREEN and CENTER_ON_SCREEN

Ensure the following dialog centres properly in the NVDA python console

from gui.startupDialogs import AskAllowUsageStatsDialog
AskAllowUsageStatsDialog(None).ShowModal()

Known issues with pull request:

None

Change log entry:

Developer changes

- `wx.CENTRE_ON_SCREEN` and `wx.CENTER_ON_SCREEN` is deprecated, use `self.CentreOnScreen()` instead. 

Code Review Checklist:

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• Pull Request description is up to date.
• Unit tests.
• System (end to end) tests.
• Manual tests.
• User Documentation.
• Change log entry.
• Context sensitive help for GUI changes.