[OEM-107] Break apart theatre diary query to reduce memory usage
[OEM-107] Fix join type on active bookings relation (with needs to match relation)
[OEM-107] Fix theatre filter on diary
[OEM-107] Removed obsolete conditional from session template
+ ensure sessions loaded for theatre diary without active bookings
+ [OEM-107] Simplify diary query
+ [OEM-107] Pass ward filter through to _session view as query is now split
Merge branch 'master' into hotfix/OEM-107
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