#126 created GrundbuchblattInputFieldConfig.json and us it in GrundbuchblattInputFieldTest and GrundbuchblattInputWindow.
#126 introduced the abreviationMaxLenght in AbstractInputField. It is the length after which a district abbreviation is automatically resolved.
#126 added GrundbuchblattInputField to AlkisWindowSearch
#126 added additional space to txtBuchungsblattnummer and fill it also with zeros if it is empty and has lost focus.
#126 introduced the defaultAbbreviationLength and the alternativeAbbreviationLength