Bug 886032 - Port the markup view to the inspector actor (readonly). r=paul

--HG--
extra : rebase_source : f33acb5d1d70fa8c18410ede8c2ab73fc3482495
Bug 886035 - Port markup view attribute editing to the inspector actor. r=paul

--HG--
extra : rebase_source : 2f11db865538ce3342dbb9f40fb7db2be1a9f5f6
Bug 886033 - Port markup view text value editing to inspector actor. r=paul

--HG--
extra : rebase_source : af259396ff4496b97d53edf39fa8f28c7edf9978
Bug 888484 - Save the default inspection node. r=paul