title: Conditional Formatting blanks if cell in another column is NOT blank
body: <p>I have a sheet with Columns <code>A-Y</code>.</p>
  <p>Column <code>A</code> is a prefilled set of numbers 1-200<br />
  <code>B-Y</code> are filled in by the end-user.<br />
  I am trying to highlight the empty cells based on Column <code>B</code>.</p>
  <p>For example, the end-user enters the <strong>Date in Column <code>B</code></strong> but does not complete the rest of the row, it would <strong>highlight each cell that is blank</strong>.</p>