* input: simplify internal implementation

remove currentValue, strictly follow one-way data flow
hack for MSIE input event when placeholder is set
remove isKorean hack (#11665, #10648)

* input-number: fix for new el-input

* test: input, fix vue warning

* date-time-range: fix for new el-input

* pagination: fix for new el-input, simplify internals

* input: fix input event on compositionend

* input-number: fix for new el-input

* input-number: nuke userInput on change

* fixed typo

* fixed typo

* Update spanish doc 2.4.10

* update changelog

* Transfer: fix bug sometimes component crash when target order is push(#13320)

* update code

* Autocomplete: add clearable prop

* Input: remove focus after clearing the value

* Autocomplete: hide options after clearing the value

* add: text status in progress circle component

* Progress: update Chinse and Spanish docs and minor improvements

* update progress

* fix: 12383 Tree in lazy mode set child node 'default-checked-keys', display wrong：All nodes are fulfilled

* 添加测试

* fix code style

* update style

* date-table: simplify implementation, fix #12980

* date-table: remove rangeState's row and column

* date-table: fix disabled cell highlight

this is a regression introduced in pr #8156, which allows disabled date to be
highlighted.

Also simplifies handleClick's implementation to avoid DOM operations.

* Alter: title is not a required prop

* update docs

* Add currentNodeKey property declaration, fix test for currentNodeKey

* translate Chines doc

* Menu:(fix) clickoutside hide submenu

* fix: optimize code

* AutoComplete: add clear event(#13317)

* remove arg in `handleClear` in AutoComplete

* DatePicker: Allowed to customize range-seprator with a slot

Currently, the only possible option for "range-selector" is a string, would be nice to use a slot, so we could have custom svg-icon there.

* update doc

* ColorPicker: not trigger form validation when dragging

* update test case for input

* Input: add test for `select` method

* InputNumber: add `select` method