Enable "Lock Tab to Dock" for all dockable dialogs in the default user interface layout
Operating System: all
Description of the feature
The feature would be a change to the default settings shipped with and used by GIMP.
In particular, it is about setting the "Lock Tab to Dock" setting for each dialog that is part of the default interface layout to enabled, preventing any accidental and deliberate movement of the tab inside its docks, and outside of its dock.
Use cases
The main audience for this change is new users, who tend to drag dialogs out of there docks by dragging sliders (e.g. brush size or opacity) and grabbing the tabs instead, without knowing what is happening and/or how they can revert this change.
Possible side effects are that the customizability of the interface becomes less obvious, and users who are used to dialogs being movable may think this feature has been removed altogether.