Bug 959917 - Cleanup: Remove unused field. r=lucasr
Bug 959917 - Part 0: Remove unused imports. r=lucasr
Bug 959917 - Part 1: Explicitly handle PanelConfig order in Editor. r=lucasr
Bug 959917 - Part 2: Support reordering in HomeConfig.Editor. r=lucasr
Bug 959917 - Part 3: Add nested reordering to context menu. r=lucasr
Bug 959917 - Part 4: Fade visual feedback. r=lucasr