Function to clear search field on order UI

[leopoldHatFertig]

Current situation
As a user, I want to able to clear the search field of the order UI easily.
Currently I need to focus (=entering) the field and manually delete the input in order to start a new search.
Especially on a touch monitor with an onscreen keyboard, this is not a good user experience, also because the input does not get selected when focussing the field

Describe the solution you'd like
A click on the search icon (magifying glass) clears all input and focusses the search field.

Describe alternatives you've considered
Or simply focussing the search field clears all input.