[Proposal] Allow Fragments to be executed on different moments

[gregsn]

Introduce a flag on the fragment definition that

• allows links with several colors (to all fragment inputs and outputs)
• leads to calling the fragment on each connected moment
• stops the moment propagation on application side (for all pins of the fragment)

The flag could be called Allow multiple calls and it could be turned on by default. Only for old patches, we'd need to turn it off, so that patches on application side don't break.

Examples

We now could offer a FlipFlop that can be reset from different moments.

State Output Quest #2 would be solved by introducing a getter Fragment that is configured that way.

[gregsn]

Allow multiple calls turned on by default might be a bad idea since you'd often need to assign links to moments manually when the link goes from one process node with the other.