New release of Core
This release contains an API fix and some smaller bug fixes

Changes
- When sending in values in the API for integer sum-fields on objects, for instance fields that count the number of members, this value will now be ignored. The value will be recalculated when the members change, but it is not possible to set it to something else.
Bug fixes
- Resolved an issue where it was sometimes not possible to copy objects if the user did not have permission to some non-editable fields
- Resolved an issue where it was possible to circumvent mandatory fields in Reserve, by submitting emojis only in that field. It will now interpret this as no value and not submit a change.