Fix license expression input fields

[nscuro]

Description

As a follow-up to #452, this PR fixes the following issues:

• Expressions typed into the Component Details dialog were not sent to the API server
• The license expression input field was missing from the Add Component dialog

Also, a previously existing issue that prevented selected licenses from being unselectable.

Addressed Issue

N/A

Additional Details

N/A

Checklist

• I have read and understand the contributing guidelines
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly