Idea Summary
Now you can only search on text columns in the search field. This is especially an issue with identity columns that you want to search on.

Use Case
An end user expects that searching via the search field searches on all visible columns and that does not work. Now we have to resort to a workaround to make these fields character fields, but then it creates the problem of the sort order of this column.
It's ok that the default is not searching on number columns (amounts and couns for instance) , but that there is on option to overrule this.