Feature Request: Bootstrap Modal Search Pop-up

I'm looking for either direction on creating a new Plug-in or adding to the core. Like the DatePicker plugin you can change the input, the Popup input would let you click an "Add" link that pop ups a Modal. You would do something in the modal then return the selected value back to the QueryBuilder. You could click the "Add" button multiple times to add multiple items.

For example, when selecting the PopUp plugin, you'd see a 'Add' link:

Clicking the "Add" link, I'd see a Modal, where I could do some Ajax search. In this example, I'm searching for Blue colors. I would click on the + sign to close the Modal and add my selection would go to the Query builder

This would be after I clicked on the plus sign next to Blue, It would show that I've selected Blue and Yellow with the option of removing them with the X.

I hope this example explains what I'm looking do add to your plugin.

Review the existing DatePicker plugin and the core QueryBuilder plugin architecture to decide where a popup input belongs. Define how a Bootstrap modal would perform Ajax search, return selected values, support multiple additions, and allow removals before implementation. Done means the modal workflow integrates with the QueryBuilder and matches the illustrated selection behavior.