Setting Resource as key to Dictionary turns key unreadable in narrower inspector

[xDGameStudios]

Godot version:
3.1 Beta

OS/device including version:
OSX Mojave

Issue description:
Setting resource as key to Dictionary makes it unreadable in a narrower inspector.
Example before adding to the dictionary:

Example after adding to the dictionary:

Right now as you can see the key is added as:

Resource([full file path])

and it could be added as:

[object icon][file name]

like it happens with other displays (i.e: arrays)

[xDGameStudios]

@akien-mga I wanted to request this to be labeled as "enhancement" as this is no bug 'per se' ... but something that could be improved.

[dalexeev]

• Fixed by [Dictionary Property Editor] Use property editors instead of labels to display keys. #100512.
• See [Dictionary Property Editor] Use property editors instead of labels to display keys. #100512 (comment).