fixed bug where admin popup url would use %2F instead of / if the file was in a subfolder.
fixed bug where admin popup url would use %2F instead of / if the file
was in a subfolder.

Change-Id: I9e7375092332b3d681962ca1c40f412ed7e6083d

WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS