[ 2.6-alpha5 ] Provide a way to disable the Vertical Shell thickness completely

[meltiseugen]

Is your feature request related to a problem? Please describe. I would like to be able to disable vertical shell thickness completely

Describe the solution you'd like a checkbox in one of the setting tabs that would allow switching on/off this feature

Describe how it would work On = generation of vertical shells thickness (default option) Off = no vertical shells are generated

Describe alternatives you've considered N/A

Additional context when wanting to crate draft models or just simple models, vertical shells thickness just takes up time and filament.