Revert "Merge remote-tracking branch 'gitextensions/net4full' into BuildServerIntegration-plugin"

This reverts commit 0e587e6acf4f5f7f68d12322343da22790f45b37, reversing
changes made to abea87d44e396e449565ec7518af345edf4c69d9.

Conflicts:
	GitUI/GitUI.csproj