flow_tryadvance: test/live :: <command if success> :: <command if fail>

Will attempt to advance the entire flow, testing against the flow conditions for all show zones; and running the attached commands depending on the result of the test. Running with a “test” flag will only run the test and the commends, “live” will also do the advance.

• test/live are flags that sets the behaviour of the test as above - only one should be used
• command if success is the command to be run if the test passes
• command if fail is optional and will be run if the test fails (optional)

Note that there is no “wait” option for this command - it must be triggered directly