Feature: #98348 - Live Search moved into modal window

See forge#98348

Description

The live search located at the top right side of the TYPO3 backend now uses a modal window to render the search controls and the results. As more space is now available, the amount of search results is increased to 50 records per search.

The modal may be opened via a keyboard shortcut by pressing the Shift key twice in a row.

Impact

Moving the search into a modal provides more possibilities for future enhancements, e.g. dynamic loading of more results or filters.