APM filter widget supports alternative display names for fields

'Drop down selection components try to show both the field title and a <select values> next to it. once the space becomes too narrow, both are abbreviated. There needs to be options to control this behaviour + by default <select values> needs to be dropped first before abbreviating the filtered field itself.

Secondary, we don’t see any option to show a field filter name different from the field name (e.g. a well-defined abbreviation like ‘FX’ for 'foreign exchange rate'). Like in chart axis titles, this needs to be manually configurable.