This was found by the materials team to be a better value. All UM3 profiles have 20 now. I've left the third-party machines intact which override the prime tower size but those that didn't override the prime tower size have their prime tower size altered as well.
Some of them ended up as 15 because that's the default in the Ultimaker 3. This was done correctly by the profile optimiser because this setting was not specified by the original profiles, but it should've been 20 for all AA 0.8mm profiles.
Contributes to issue CURA-3650.
They share the same profiles. They should also have the same settings in the variants, but this is not automatically shared for some reason.
Contributes to issue CURA-3650.
These are now upgraded to version 3, meaning that they will have to increase their version numbers and remove any start_layers_at_same_position settings they define. None of these profiles define any start_layers_at_same_position so it's just the version number then.
Contributes to issue CURA-3479.
