[LANDED] Added object navigation functionality.

Closed Rynhardt Kruger requested to merge rynkruger/orca:object_navigation into master

NOTE: This was manually landed with some changes in fb4f0d08.

This will allow the user to navigate through a hierarchy of UI objects, mostly based on the object hierarchy as it appears to Orca. Added the following commands:

  • Commands for moving to the parent, first child, next and previous sibling. Bound to CTRL+Orca+arrows.
  • A command for acting on the current object with navigator focus, usually performs a click. Bound to CTRL+Orca+Return.
  • A command for toggling the simplification of the object hierarchy. Bound to CTRL+Orca+S.
Edited by Joanmarie Diggs

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