DEICH-6373 - TK - Some search improvements, as detailed below

  **Fixed date range select**

     Uses luxon date.
     Added filtering of selected date filter (does not show up in available list).
  **Additional filtering fix**

     Previously the available branches and categories were fetched from the result aggregate. This resulted in a narrowed down category and branch selection option after filtering (i.e.: 1 item). This was changed, now all branches and all categories are visible always. Also, filters were updated not to contain already selected items.

  **Refurbished sorting**

     Made ordered sorting of multiple fields possible (index displayed in sorting header). Current sortable fields are date, title and category.

  **More component reuse**

     Both, FilterDropdown and DateRangeFilterDropdown uses EditDropDown.
     Added reusable wrapper, SortOderButton.

  **Misc**

     Fixed `;` in webpack.config.js.

DEICH-6373 - Added support to object typed ids (so that the component can be reused for date filtering in LibraryEventSearch)

DEICH-6373 - Sibyl - fixed consistent sort order when multiple sort fields are defined.

    Previously a map was used, to store SortParameters, however, maps do not guarantee the retrieval order. This has cosed inconsistent behaviour as TK introduced multiple sort field option.

DEICH-6373 - Validation framework addition - skipValidation

    If set to true, the given input component is not taking part in the validation framework. All validation setup elated error messages are suspended.

    In addition improved EditDropDown re-usability so as that it can be used in LibraryEventSearch.