Description:
In report wizard when you select some fields for grouping then when you move on to sort options those fields seems pre-selected (the user cannot change its value, which seems normal) but there is no text on the drop-down menu button. 

A related issue (do not have to be fixed here) is that the interface allow you to select a fild for sorting more that one time and then gives you an error: "The sort criterion '...' was chosen twice. Each criterion can only be chosen once.". A more intuitive interface would only provide the valid choices in the drop-down menu. 

Tested in:

Version: 26.2.3.2 (X86_64)
Build ID: 620(Build:2)
CPU threads: 16; OS: Linux 7.0; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Ubuntu package version: 4:26.2.3.2-0ubuntu0.26.04.1
Calc: threaded

Steps to Reproduce:
1. Create a database and a table
2. Go to report wizard up to selecting a field for grouping
3. Move on to Sort options 

Actual Results:
The first lists that are preselected have no visible value

Expected Results:
The field names should be visible on the list menu.


Reproducible: Always


User Profile Reset: No

Additional Info:
N/A