Disable all Downstream tools

[T_Willins]

When working on a complex, branching workflow I sometimes go down paths that do not give the correct result, but I want to keep them as they are helpful for determining the correct path.  I do not want these branches to run as they slow down the workflow or may produce errors/warnings that muddy debugging the workflow.  These paths can be several tools long and are not easily put in a container and disabled.  Similar to the Cache and Run Workflow feature that prevents upstream tools from refreshing i am suggesting a Disable all Downstream Tools feature.  In the workflow below the tools in the container could be all disabled by a right click on the first sample tool in the container.