Tree incorrectly parents meta files

[shana]

If two files start with the same string, the tree control incorrectly parents the first file's metafile (i.e., it doesn't get parented).

[StanleyGoldman]

12:05 $ git status -b -u --porcelain
## master
?? Assets/Plugins/GitHub/Editor/GitHub.Unity.dll
?? Assets/Plugins/GitHub/Editor/GitHub.Unity.dll.mdb
?? Assets/Plugins/GitHub/Editor/GitHub.Unity.dll.mdb.meta
?? Assets/Plugins/GitHub/Editor/GitHub.Unity.dll.meta