Cannot create dynamic dropdown in Calls dependent on Status field

[QuickCRM]

Because the key for Not Held Status is Not Held (contains a space), it is impossible to create a dynamic dropdown based on the Status field since spaces in keys are not allowed in Studio.
So we cannot build a second status that would explain why a call is not held (for example Out of office, Wrong number, No longer work here).

Issue

Expected Behavior

Actual Behavior

Error message when saving a new entry for the dependent dropdown list

Possible Fix

Allow all characters in keys that are already in core lists (so allow space and /)

Steps to Reproduce

Context

Your Environment

• SuiteCRM Version used: Any
• Browser name and version (e.g. Chrome Version 51.0.2704.63 (64-bit)): Any
• Environment name and version (e.g. MySQL, PHP 7): Any
• Operating System and version (e.g Ubuntu 16.04): Any

[QuickCRM]

The same problem occurs if you want to create dynamic dropdowns based on Lead Source, Opportunity Type, Opportunity Sales Stage (with even another problem with Proposal/Price Quote key), etc