Manual reexecute only

[jessdtate]

to interact better with interactive widgets and modules, it would be helpful to have a was to hold parts of a network for explicit reexecution.

The prevailing idea is to make this an option for all modules with a UI indicator on the network level, a change in color or a graphic (stoplight?). There are some ideas for additional buttons, an additional ui window, on the side (part of the graphic), or use existing reexecute buttons.