manual rebase of aba72880e1fb73a5f61934a4468f7137c73cbbb8 from Levi, fixing: "Force new value creation onto the correct appdomain.
Fixes setting string field/property values from the text visualizer."
Merge pull request #13 from Unity-Technologies/upstreaming/debugger

manual rebase of aba72880e1fb73a5f61934a4468f7137c73cbbb8 from Levi, fix...