code: function updateResizeLimits() {
          var editorAreaHeight = $editorHolder.height();
  
          $editorHolder.siblings().each(function (i, elem) {
              var $elem = $(elem);
              if ($elem.css("display") === "none") {
                  $elem.data("maxsize", editorAreaHeight);
              } else {
                  $elem.data("maxsize", editorAreaHeight + $elem.outerHeight());
              }
          });
      }
docs: Updates panel resize limits to disallow making panels big enough to shrink editor area below 0