* Table: Adds header rendering slot

Fixes #4909 and #4908

* Add translation to spanish

* Include render-header deprecation warning

* Add chinese translation and scoped slot description at bottom

* Fix documentation and warnings. Fix custom-header docs

* Fix redundant columns and cleanup example

* Prevent scopedSlot from working on selection column

* Typo

* Alert: add support for title slot

* update documents

* Select: Fix (#11392 & #12327) Writing space become small when collapse-tags prop is added & input takes new line even if space is available when filterable & multiple props are true

* Changes as IE & Edge dosen't support display: contents

* Revert "Changes as IE & Edge dosen't support display: contents"

This reverts commit 21475c6daac3e0ca364b4a9889e899316e553839.

* Fixed issue - input going in new line even if there is space (collapse-tags)

* Made calculating with dynamic (replaced static 208 with el-select__tags dynamic width)

* Select: Fixed Bug - Extra Height

Fixed bug - getting extra height whenever last options width is most of same as select's width

* Tag: optimize code

* update tag.vue

Cascader select readonly 添加 edge 浏览器判断;
src/utils/util.js 添加 isIE, isEdge方法;

Date-picker: set year to '', add missing translations.
Pagination: translate /page

* Upload: use uid as upload-list key

* chore: fix code style

* Select: make clearable work for multi select (#6399)

* Select: chore

* Select: fix bug and update docs (#13049)

校对有些错误字

* select: refactoring icon reverse

* select: disable clear icon when select popup is visible

* select: refactoring clear icon

年前面加上“-”， 在维语中年前面要写“-”表示第几年

* badge: add type attribute

* Update badge.md

* Dropdown: Added slots to documentation

Added slots section in english to documentation for dropdown component. Chinese and Spanish missing.

* Update dropdown.md

* changelog for 2.4.8

* Update CHANGELOG.en-US.md

* Update CHANGELOG.es.md

* Tabs: fix not scrolling to active tab

* update tabs.vue

A textarea element can also have an autocomplete attribute.
Reference: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/textarea

* date-picker: fix confirm() ignoring date validity

make date-range panel's confirm validate date before confirming.

1. disable confirm button if picked date is invalid
2. reset highlight date on picker open (resetView)

* test: date-time-range confirm honors disabledDate

* [Button]Support Dropdown in ButtonGroup(#12815)

* [Button]Support Dropdown in ButtonGroup(#12815)

* [Button]Support Dropdown in ButtonGroup(#12815)

* Form: Emits error message on validate events

* Update form.md

* Tabs: fix order of TabNav when array is sorted

* update tabs.vue

* update test cases

Added Serbian translation.