Allow setting default for Parameterisation Signals

[Necandum]

Parameterisation is A++ amazing feature.

Currently, it is possible to have a default value for numerical fields, but not for signals.
For the use case of pasting a blueprint numerous times with the same settings, but occasionally needing to change it, it might be useful to have the ability to set a default signal for parameterised signals.
There even appears to be space in the UI to have a default field after the "Ingredient of " field.


At the risk of cluttering the UI / being greedy, it might also be useful to have a "set as new default" checkbox when placing a parameterised blueprint with parameters. This checkbox should retain state and only change on player input.