Building creation / street search improvements

[luytena]

Building creation

• Remove locality name as an input field, getStreet only uses the PLZ
• Display the locality name in the street search options
• Use the locality returned in the getStreet response for the addBuildingToConstructionProject request

Street validation

• Make the street input required through a validation check

Multilingual street search

• Make a first request using the language selected in eBau
• If no streets are found, try the other available languages
• Display the street results using the language(s) where results were found (concatenating if results for multiple languages are found)
• Continue further search requests with the same language (for example when continuing typing)

[derrabauke]

Notes for Building creation & Street validation

[derrabauke]

Notes for Multilingual street search

• cache for last successful street search results, only as long as on the current route
• assume a municipality only covers one language
• first request with primary language and if empty, try with other languages enables for that canton, ignore duplicates for now