title: Merge conditional formatting rules of two different cells in a single cell
body: <p>I have a cell (say A1) whose value ranges between 0 and 1.
  Then I have other two other cells (say B1 and B2), each one with a specific conditional formatting rule based on the value in A1.</p>
  <p>What I want to do is to copy both the rules to a SINGLE cell (say C3).
  That is, C3 should use the same rule of B1 <em>and</em> the same rule of B2.</p>
  <p>How can I do that?</p>