Michał Gołębiowski-Owczarek 0c860b0d92 All: Remove usage of jQuery positional selectors ... jQuery positional selectors () have been deprecated in [jQuery 3.4.0](https://blog.jquery.com/2019/04/10/jquery-3-4-0-released/) and they'll be removed in jQuery 4.0.0. This PR removes their usage. Most of the changes were possible without changing public API. However, dropping `:even` usage required a change to the [`header` option](https://api.jqueryui.com/accordion/#option-header) of the accordion widget. I made it an optional function; this will need to be documented. The polyfill for `.even()` & `.odd()` is added for jQuery <3.5.0. There was no usage of the :odd selector in the code but the `.odd()` method is also polyfilled for completeness. Closes gh-1904		2020-01-22 16:44:34 +01:00
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selectmenu.html	All: Remove usage of jQuery positional selectors	2020-01-22 16:44:34 +01:00