- **Dropdown** - Dropdowns will automatically detect when they are offscreen to the right and will open leftward instead **Thanks @Graveheart** [#4211](https://github.com/Semantic-Org/Semantic-UI/issues/4211)
- **Form Validation** - Added `add rule``add field`, `remove rule`, `remove field` to programmatically and and remove validation rules from form validation [#4267](https://github.com/Semantic-Org/Semantic-UI/issues/4267) [#5253](https://github.com/Semantic-Org/Semantic-UI/issues/5253)
- **Site** - Site now includes custom scrollbar styles for UI (not page) by default in WebKit/Chrome. Components with inverted content like dimmer include an inverted scrollbar. You can disable this by setting `@useCustomScrollbars: false` in your `site.variables`
- **Site** - Site now includes custom styles for in-page UI scrollbars (but not actual page scrollbar) by default in WebKit/Chrome. Components with inverted content like dimmer include an inverted scrollbar. You can disable this by setting `@useCustomScrollbars: false` in your `site.variables`
- **Modal** - Adds new `scrolling content` variation to have a modal with content that scrolls
- **Sticky** - Sticky now includes a new setting `setSize` to determine whether it should set content size on stick to the size before sticking (fixed content uses different positioning system) [#4360](https://github.com/Semantic-Org/Semantic-UI/issues/4360)
- **Reset** - Upgrades to [normalize.css 7.0](https://necolas.github.io/normalize.css/) **Thanks @ivantcholakov** [#4647](https://github.com/Semantic-Org/Semantic-UI/issues/4647)
- **Popup* - Added `bind clickaway``bind touch close``bind close on scroll` behaviors to make it easier for `on: 'manual'` popup to specify behavior
- **Popup** - Added `bind clickaway``bind touch close``bind close on scroll` behaviors to make it easier for `on: 'manual'` popup to specify behavior
- **Popup** - Separated className setting for `visible` into `visible` and `popupVisible`, this way you can remove visible indication on activating element without modifying popup visibility.
- **Build Tools** - All Gulp/NPM dependencies have been updated to their latest versions
- **Steps** - Steps now include an `unstackable` variation **Thanks @TemaSM** [#3714](https://github.com/Semantic-Org/Semantic-UI/issues/3714)
**Bugs**
- **Table**- Fix inverted table header color not applying properly to `sortable table`**Thanks @Banandrew** [#5303](https://github.com/Semantic-Org/Semantic-UI/issues/5303)