WISHES: entwine behaviour and custom preview behaviour

WISH 1 - entwine: It would be great if it wouldn't flatten everything first (if not flatten was selected), instead it would add a main branches to the input.

Example

input: {0;0}, {0;3}, {1;0}

output (without flatten on inputs): {0;0;0;0}, {0;1;0;3}, {0;2;1;0}

WISH 2 - when using the "only draw geometry for selected objects" mode - then the objects in the custom preview component would show with their custom setting instead of the usual selected objects color (usually green).