[2.3.0] Checkmk Werk 16042 created: Change default number of host/service columns to 1

Title: Change default number of host/service columns to 1 Class: feature Compatible: compat Component: multisite Date: 1696411300 Edition: cre Knowledge: undoc Level: 1 Version: 2.3.0b1 To improve our users' overview on builtin views, the default number of host/service columns is changed from 3 to 1. Also, the according display option "Number of columns" is renamed to "Entries per row".