nvda

5ad32bf4 - Abstract vision framework with included support for focus, navigator object and browse mode caret highlighting (PR #9064)

Abstract vision framework with included support for focus, navigator object and browse mode caret highlighting (PR #9064) Foundations of framework to enable: - #7857: Making the screen black (i.e. a screen curtain) while NVDA is active, mainly for privacy reasons - #971: Visual highlight of focus, review or browse mode caret location - Basic screen magnification facility within NVDA. This pr intends to lay the base of a vision framework that can be used to implement such functionality in the core of NVDA. Though there is no GUI in the current pull request, the framework is functional.