1.1.4dev: Omit link to previous version of page if it doesn't exist. Refs #11725.
1.1.4dev: Omit link to previous version of page if it doesn't exist. Refs #11725.


git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@13698 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,walty8/trac,walty8/trac,walty8/trac