Filter search property list does not show non-string properties, which is confusing

[kmcginnes]

The filter search property dropdown only shows properties that are string values. Number, date, and boolean properties are not shown. This can be confusing since the properties show up in the node/edge details views.

Potential solution

Change the UI labels to make it clear that the properties are strings only.

Related issues

• [Feature Request] Unable to search for nodes by property if the property is datetime #105
• [Feature Request] Boolean/greater-than/less-than search #70