Fix CTRL-Z for tcell renderer by using the official API

See https://github.com/gdamore/tcell/pull/431

src/terminal.go

@@ -3619,7 +3619,7 @@ func (t *Terminal) printColoredString(window tui.Window, text []rune, offsets []
 	for _, offset := range offsets {
 		b := util.Constrain32(offset.offset[0], index, maxOffset)
 		e := util.Constrain32(offset.offset[1], index, maxOffset)
-		if url != nil && offset.url == nil {
+		if url != nil && offset.url != url {
 			url = nil
 			window.LinkEnd()
 		}

src/tui/tcell.go

@@ -569,13 +569,13 @@ func (r *FullscreenRenderer) GetChar() Event {
 
 func (r *FullscreenRenderer) Pause(clear bool) {
 	if clear {
-		r.Close()
+		_screen.Suspend()
 	}
 }
 
 func (r *FullscreenRenderer) Resume(clear bool, sigcont bool) {
 	if clear {
-		r.initScreen()
+		_screen.Resume()
 	}
 }