nvda

de30b4a1 - installer: When copying the uninstaller before executing it before installing, pass /Silent to CopyFiles so that a copy files dialog does not appear. Also, delete the temp copy of the uninstaller after the installer has been brought back to the front (made visible again), deleting used to occure before. These changes may hopefully stop the bug where focus does not go back to the installer after the uninstaller closes. Possible fix for #296