100858: Merged 5.0.N (5.0.2) to HEAD-BUG-FIX (5.1/Cloud)
100769: Merged V4.2-BUG-FIX (4.2.5) to 5.0.N (5.0.2)
100158: Merged DEV (4.2.5) to V4.2-BUG-FIX (4.2.5)
100074: MNT-13579: IMAP: Sync doesn't work anymore after a Site which is already marked as IMAP favorite got deleted in Share.
- Added a check to handle non-existent sites.
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@100928 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261