Add action to reload parent pane

[tekknolagi]

I am working on a plugin for a workflow similar to git rebase -i. I have a primary parent pane with {status} {commit} pairs. I have a keybinding (enter) to view the commit in a preview pane, but if I want to act on it, there is no way to refresh the parent pane to reflect its new status (changing from pick to squash or something). It might be useful to be able to refresh the parent pane.