code: func (l *TableView) EnsureColVisible() {
  	if l.isColVisible(l.selectedCol) {
  		return
  	}
  
  	if l.selectedCol < l.topCol {
  		l.topCol = l.selectedCol
  		return
  	}
  
  	width := l.width - 1 - l.counterWidth()
  	if l.showRowNo && l.showVLines {
  		width--
  	}
  
  	toShow := l.selectedCol
  	for width > 0 {
  		if l.columns[toShow].Width > width {
  			if toShow == l.selectedCol {
  				break
  			} else {
  				toShow++
  				break
  			}
  		} else if l.columns[toShow].Width == width {
  			break
  		} else {
  			width -= l.columns[toShow].Width
  			if width < 0 {
  				break
  			}
  			toShow--
  			if toShow == 0 {
  				break
  			}
  		}
  	}
  
  	l.topCol = toShow
  }
docs: // EnsureColVisible scrolls the table horizontally
  // to make the currently selected column fully visible