Automatically create and update functions for behavior properties

[D8H]

Adding an action, a condition and an expression for each behavior properties can be very time consuming. The GUI could generate them automatically using the same logic as BehaviorMetadata::AddExpressionAndConditionAndAction to generate full name, sentence and description from the property label.

User story A - Add a property

• users add a property to a behavior
• they choose to not flag it as read-only
• they see 3 new functions appear in the function list
• they open the generated action to see what is generated

User story L - Edit a property

• users change the property label
• they open the action for this property
• they see that the full name, description and sentence has been updated to follow the new property label

User story M - Modify a property function

• users open the action generated for a property
• they add new events next to the property setter action

User story D - Delete a property

• users delete a property
• they still see the 3 new functions in the list.
• they delete the 3 functions

User story R - Rename a property

• users change the name of a property
• they see 3 new functions for the new property name.
• they copy paste their custom events from the old property functions to the new ones
• they delete the 3 old property functions

User story S - Custom full name, description or sentence

• users change the sentence of a generated action
• they see an indicator that the content is out of synch
• they click on the indicator and see a comparison of the default full name, description and sentence and the actual ones for the 3 functions
• they realize that the fields can be generated
• they choose to keep their changes for now
• they open the properties editor
• they see the same indicator next to the property
• they change the property label
• they click on the indicator
• they choose to update the functions and lose their modification on the sentence

User story H - Add a hidden property

• users add an hidden property to a behavior
• they don't see any new function in the function list