Cannot enter "Default Value" in "Parameter Definitions" dialog

[flandreas]

Scenario:

• Open any circuit
• Open "Parameters Definitions" in property "Parameters"
• "Add" a new parameter definition
• Choose type "Bit Width"

=> The "Default Value" field is disabled. The user cannot enter a default bit width.

Current workaround

• Apply and save without "Default value"
• Edit the parameter definition
• Now, the default value can be edited