New features:

  -  rerun one step (use launch:runstep instead; EOL ezsteps:run-from)
  -  rerun one step and subsequent steps  (use launch:manage-steps instead; EOL ezsteps:run-from)
  -  rerun logpro for each step
       -  extracting logpro files from tconfig if source is there in [logpro] section)
       -   inheriting env by presourcing megatest.sh in testrundir prior to logpro execution

Approach:

  - add megatest command -redo-logpro
      -  launch:execute redo-logpro: #t
  -  add redo-logpro to runs:operate-on
  -  add redo-logpro to test control panel in dashboard
  -  add redo-logpro to run context menu to do for entire run
  -  implement enhancement by augmenting existing codepath:
   launch:execute -> (launch:manage-steps && launch:monitor-job)