Adding auto horizontal scroll when expanding the tree.

git-svn-id: https://specify.svn.sourceforge.net/svnroot/specify/trunk/Specify@10856 ce9bf4bf-376f-1848-a496-a1c9fe3b1a39
Adding auto horizontal scroll when expanding the tree - removed more unneeded code

git-svn-id: https://specify.svn.sourceforge.net/svnroot/specify/trunk/Specify@10857 ce9bf4bf-376f-1848-a496-a1c9fe3b1a39