#110 backend: Search result not identical with Swing

Testcase to check if searching lookups work without diacritics

1. create a new product which contains diacritics (e.g. Frisée)

2. add it in pricelists

3. create a new sales order for G000X

4. select batch entry and start to write Frise (without diacritics)
   • => the product autocompletes to Frisée
5. add a qty, press ok
   • => line added successfully
6. repeat the same steps for purchase order
   • => works the same