Merged r6206 from trunk.
Fixed: Wiki annotated page does not display author of version 1 (#8449).
Merged r6203 and r6204 from trunk.
Adds visibility condition on parent project in API.
Adds parent project to /projects/:id API (#8229).
Merged r6201 from trunk.
Fixed: search options get lost after clicking on a specific result type (#7501).
Merged r6199 from trunk.
Fixed: Setting issue attributes from mail should be case-insensitive (#8759).
Backported r6197 from trunk.
