Editor crashes on nullable value type fields

[zgxnet]

Release Type: GitHub source current branch

Version: Latest commit at time of report

Platform(s): Windows

Describe the bug
The editor crashes when handling nullable value types, e.g. float?

To Reproduce
Steps to reproduce the behavior:

1. Define a component with a nullable value type field (e.g. float?)
2. Add the component to an entity
3. Attempt to edit the field in the editor
4. Editor crashes

Expected behavior
Nullable value type fields should be editable like regular fields, where an empty string represents null

Screenshots
Not applicable

Log and callstacks
Not applicable

Additional context
It appears that the editor doesn't currently support nullable value types