- This patch will expose the Meta strip functions in the Sidebar: https://developer.blender.org/T74130
- Correct some polls, so a sidebar with no active strip, will be empty.
- Move a couple of panels above Adjustment panel, since all other strip specific panels are also above Adjustment panel. These has been moved up: SEQUENCER_PT_scene, SEQUENCER_PT_meta, SEQUENCER_PT_mask, SEQUENCER_PT_effect_text_style, SEQUENCER_PT_effect_text_layout, SEQUENCER_PT_effect_text_style_shadow,
