Fix failing tests

- Add missing project to Palaso VS2010.sln
- Add app.config for PalasoUIWindowsForms.Tests so that TC hopefully can find
  libgtk-x11-2.0.so.0 library

--HG--
branch : FlexBridgeBeta
Roll a test change back so that it works again.

--HG--
branch : FlexBridgeBeta
Backed out changeset: 5315969ccbca

--HG--
branch : FlexBridgeBeta
Fix failing tests

- Add missing project to Palaso VS2010.sln

--HG--
branch : FlexBridgeBeta