Is your feature request related to a problem? Please describe.
When you add an Action/Repeat/Loop/Pause (in the Sequence Editor), a new block gets added at the end (it's normal and expected).
But let's say the sequence is already quite long and you want to add more blocks.. in this case, you currently have to scroll up to the top to be able to see these buttons again:

Usability wise, I think that the entire row where these icons are located (but also the "Raw Edit" , "Compiled Template" and "Delete this version" buttons) should stay visible (at all times) even if the player scrolls down the Sequence frame.

Describe the solution you'd like
Only make the "Sequence frame" scrollable (don't add this "row of buttons" above into the scrollable area).
This way, the player would have access to these buttons every time. Even if the sequence is long.

Additional context