Nested Group Display in Sequencer

[CatalinaLights]

Is your feature request related to a problem? Please describe.
I love it that when Groups are expanded in the Sequencer View the items included in the group indent to the right as an indication that they are part of the group above. Expanding the sub-group contents does not further indent its collection of items, making it difficult to determine if they are directly in the top-level group or the sub-groups. Several times I have accidently added an effect to what I thought was a model within a sub-group, but was actually adding it to a model in the top-level group and vice-versa.

Describe the solution you'd like
I think it would be very useful if when groups are included in other groups, expanding the top group and then the sub-groups would indent the sub-group items even more to the right, making it clearer that they are part of the group above them.
On the attached sketches, the red outline is the top level EVERTHING group, green are the sub-groups, and blue are the individual models within the sub-groups. I would like to see the blue-circled models indented to the right, somewhat like is shown on the Nested Groups-Enhanced image.

Nested Group Display.zip

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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