Add a setting to enable or disable dragging and dropping text with the mouse in LineEdit and RichTextLabel

[danny88881]

Describe the project you are working on

I am working on a game that makes heavy use of TextEdit, LineEdit, and RichTextLabel.

Describe the problem or limitation you are having in your project

While I am able to disable the dragging and dropping feature on TextEdit, both LineEdit and RichTextLabel still have this feature enabled creating an inconsistency.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

The feature would be an option to disable this behavior on LineEdit and RichTextLabel just like the drag_and_drop_selection_enabled property of TextEdit.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Extend the drag-and-drop option of TextEdit to LineEdit and RichTextLabel

If this enhancement will not be used often, can it be worked around with a few lines of script?

Not that I am aware of

Is there a reason why this should be core and not an add-on in the asset library?

The feature already exists for the TextEdit node.

[KoBeWi]

If you don't need other mouse features, you can set mouse_filter to IGNORE.

[akien-mga]

Implemented by godotengine/godot#79563.