Scroll to top when showing subcommits (#5425)

Previously, when showing subcommits of a branch or tag, scrolling down,
and then going out and entering subcommits again, it would select the
first commit but keep the previous scroll position, so that the
selection was not visible.

pkg/gui/controllers/helpers/sub_commits_helper.go

@@ -66,6 +66,7 @@ func (self *SubCommitsHelper) ViewSubCommits(opts ViewSubCommitsOpts) error {
 	subCommitsContext.GetView().TitlePrefix = opts.Context.GetView().TitlePrefix
 
 	self.c.PostRefreshUpdate(self.c.Contexts().SubCommits)
+	subCommitsContext.FocusLine(true)
 
 	self.c.Context().Push(self.c.Contexts().SubCommits, types.OnFocusOpts{})
 	return nil