[OE-4216] - completed changes to overall periods and visits to be lookup compliant and added admin for overall periods
[OE-4216] - added admin for visit interval used in gonio
[OE-4216] - change current management lookup tables to include lookup behaviour
[OE-4216] - added current management lookup tables admin pages
Revert "[OE-4385] update iop graph to match va graph"

This reverts commit 9660bcc85b168a7f49a169ac77e7c4eb63795ec2.
[OE-4385] update va to match iop
[OE-4385] die stray r
+ [OE-4440] fixed typo that was breaking VA unit selection
[OE-4216] - changed to overall management target iop to a lookup table reference, also changes reflected in javascript
[OE-4216] - added target iop admin page
[OE-4006] fixed sided eye model rules
Merge branch 'release/1.7' of https://github.com/openeyes/OphCiExamination into release/1.7
[OE-4465] fixed iop history graph
[OE-4213] fixed injection management import
[OE-4216] - fix to allow null values for iop target
[OE-4468] removed iop default
Merge branch 'release/1.7' of https://github.com/openeyes/OphCiExamination into release/1.7
[OE-3998] - changed NR to - . Functionality stays the same. A NR (not recorded) value cannot be set as all readings are required
[OE-4497] Adjusted display order of visual function element type
Replace Yii::app()->db with $this->dbConnection