zrepl status: switch back to tview from cview & upgrade to latest (#846)

While investigating https://github.com/zrepl/zrepl/issues/700
I checked in on `zrepl status` dependencies and found that
`cview`, which was/is a fork of tview, appears to be unmaintained.

We switched to it 4.5 years ago in a58ce74.

Checking now, `github.com/rivo/tview` seems to be somewhat maintained
again.
I also checked what k9s uses because that tool came to mind as a Go
terminal UI app.
It does use `tview`, but, a fork that has diverged substantially.

Maybe in another 4.5 years stuff the ecosystem has consolidated...

refs https://github.com/zrepl/zrepl/issues/700

internal/client/status/status_legacy.go

@@ -7,10 +7,10 @@ import (
 	"sync"
 	"time"
 
-	tview "code.rocketnine.space/tslocum/cview"
 	"github.com/gdamore/tcell/v2"
 	"github.com/mattn/go-isatty"
 	"github.com/pkg/errors"
+	"github.com/rivo/tview"
 
 	"github.com/zrepl/zrepl/internal/client/status/viewmodel"
 )
@@ -28,7 +28,7 @@ func legacy(c Client, flag statusFlags) error {
 	textView := tview.NewTextView()
 	textView.SetWrap(true)
 	textView.SetScrollable(true) // so that it allows us to set scroll position
-	textView.SetScrollBarVisibility(tview.ScrollBarNever)
+	// textView.SetScrollBarVisibility(tview.ScrollBarNever)
 
 	app.SetRoot(textView, true)