Effects workflow improvement

This is a task to collect the improvements we want to make to the effect workflow

• Switch to effects whitelist #1786, maintained effects
• Revisit blocklisted/highlited effects
  • Revisit ladspa-swh plugin packaging with Craft (see this discussion)
• Improvements to Effect Stack Widget (easier reordering, allow selection for copy, ...) #794 #1876
• Color grading improvements #1848, #472
• Built-in effects #351 #1376