[OE-3509] Make PP description only required if it is childless
bugfix for when migrating from cold
bugfix for when migrating from cold
bugfix
fixed when migrating against cold
fixed for when migrating from cold
+ [SUP-49] always use snellen metre for VA letter api methods
+ [SUP-49] fix the findings string to convert units as well
Merge branch 'master' into develop

Conflicts:
	migrations/m121111_155600_glaucoma.php