* Update react-overlays to latest version
* Fix breaking changes in dropdown menus
* Use react-overlays built-in arrow positioning feature
* Re-implemented `.dropdown-menu__arrow` to have a defined width and height to improve positioning
* Moved wrapping div (`.dropdown-menu` from `DropdownMenu` to `Dropdown`)
* Wrap button in a span to solve issue with ref
* Temporarily remove animations
* Fix breaking changes in emoji picker
* Wrap EmojiPickerMenu in a div where react-overlays’ ref is added
* Fix breaking changes in language dropdown
* Fix breaking changes in privacy dropdown
* Fix breaking changes in search form
* Add animations back using `@keyframes`
* Fix arrow color in light theme
* Fix linting issue
* Remove unused `mounted` state
* Remove `placement` state from components and redux
And remove the placement state from props of the menu components.
* Remove abolution position to fix flip issue
* Remove z-index to fix modals and overlay positions
* Fix lint issues
* Set placement in privacy and language components
Copy the placement state into the `PrivacyDropdown` and `LanguageDropdown` components, to apply correct styling to the buttons depending on which placement the Overlay has.
* Move `placement` state to correct component
* Fix compose form submission reloading web interface
Fix regression introduced by #19742
* Fix various compose form buttons being handled like submit buttons
* Fix coding style issue
* Fix missing onClick prop check
* Add database table for status-specific filters
* Add REST endpoints, entities and attributes
* Show status filters in /filters interface
* Perform server-side filtering for individual posts filters
* Fix filtering on context mismatch
* Refactor `toServerSideType` by moving it to its own module
* Move loupe and delete icons to their own module
* Add ability to filter individual posts from WebUI
* Replace keyword list by warnings (expired, context mismatch)
* Refactor server-side filtering code
* Add tests
