Dynamic Input/Output Columns

[Seneral]

Many developers need a variable amount of Inputs/Outputs, and as an alternative to allowing multiple inputs into one connection, many node editors instead have a variable range of inputs/outputs which adapt when the user adds more connections. This could currently be done in the node but a generic solution built into the node itself would be more apropriate IMO. This will be addressed with a low priority in the future if nobody necessarily needs it as of now.