Make the installation copy GitExtensions.exe.config so that Newtonsoft.Json.dll can be loaded.

Fixes gitextensions/gitextensions/issues#1971

(cherry picked from commit 7c2cf2ad09fc00c19b7e362f9aca23d358e3f4c6)

Conflicts:
	Setup/Product.wxs
Merge branch 'release/2.46' into release/2.47