Allow menu to stay open after setting value

[j-clark]

Basically what I'm looking for is some way to keep the menu open after a value has been set.

In my specific case, I'm building a nested select that has a tree of options that are refined as you select them, until you select a leaf node, at which point the actual value of the select is set.

This allows me to do roughly:

onChange(value) {
  if (isLeafNode(value)) { 
    handleLeafNode(value);
  } else {
    handleNonLeafNode(value);
    return false;
  }
}

Open to any feedback or suggestions about a better way to achieve what I'm going for

[coveralls]

Coverage remained the same at 90.792% when pulling c01d2c7 on j-clark:master into 710bae6 on JedWatson:master.

[coveralls]

Coverage remained the same at 90.792% when pulling c01d2c7 on j-clark:master into 710bae6 on JedWatson:master.

[coveralls]

Coverage remained the same at 90.792% when pulling 67ad569 on j-clark:master into 710bae6 on JedWatson:master.