Reinstated lazy caching of the current display path. Will need to be tested through the GUI.
Reinstated lazy caching of the current display path.
Will need to be tested through the GUI.

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@6284 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core