- **Form Validation** - Added ability for field validation to depend on other fields being filled out
- **Popup** - Added new setting `boundary` and `scrollContext`. `boundary` lets you specify an element that the popup will try to position itself to be contained inside of. `scrollContext` lets you specify the element which when scrolled should hide the popup
- **Popup** - Added new settings `autoRemove`, which is enabled by default. This will add special event listeners to auto hide a popup if the triggering element is removed from the DOM. This is useful in controlled DOM environments like Meteor/Ember/React to ensure a popup auto-hides itself when a page navigation or other DOM change occurs that may not trigger `mouseout`.
- **Dropdown** - Dropdown now changes user selection on keyboard shortcuts **immediately**, this will save the extra `enter` key press to confirm selection in most cases. To enable previous pre `2.2` selection style use the setting `selectOnShortcut: false`
- **Dropdown** - Dropdown now changes user selection on keyboard shortcuts **immediately**, this will save the extra `enter` key press to confirm selection in most cases. To enable previous pre `2.2` selection style use the setting `selectOnKeydown: false`
- **Dropdown** - Multiple select dropdown now sizes current dropdown input based on rendered width of a hidden element, not using an estimate based on character count. This means search will never break to a second line earlier than would normally fit in current line.
- **Dropdown** - Added new setting for search selection `hideAdditions` this will remove showing user additions inside the menu, making for a more intuitive adding process. Dropdowns now have a new state `empty` which will format an active dropdown with empty results. #3791
- **Dropdown** - Adds new `allowReselection` option to trigger `onChange` events even when reselecting same value ***NEEEDS DOCUMENTATION***