2754: Add easy "Inputs" tab for providing required/described inputs for a pipeline instance.
2754: Allow editing the same parameter in two different places on the page.
2754: Fix up instruction text and formatting.
2754: Add integration test, fix selection bugs.
2754: Allow template to specify form label, fix up wording and formatting.
2754: Fix css selectors in test case.
2754: Make default parameter label more explicit.
2754: Merge branch '2754-easy-run-pipeline' refs #2754