Assign category recursively

Would be great to have the possibility to assign a custom category recursively to all dependencies, instead of having to right-click each one.

For example, for things like this:

Screenshot

This could be done, for example, via modifier key: If I assign the category "Map" via context menu to the top-level item ("HandyNotes") while holding down the Shift key, "Maps" would be assigned – additively – to all its children.

The same for removing a category assignment.

Showing custom categories in tooltip

Would be useful mainly in the category setup process, to quickly see, without right-clicking, if I have applied the category. (But also later for certain addons, where the description is so poor that you have no clue what this thing was for ;)

Like this:

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Thanks for considering,

– Tom

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Edit: Replaced example image for recursive categories with a better one.