Bug 482394

SUMMARY
Feature request: 
Folders and files can be selected easily with the keyboard by typing the first or the first few letters. However, this does not work when the names start with a special character, for example the German "Umlaut". It would be nice if characters with modifiers would be treated the same as others.


STEPS TO REPRODUCE
1. Create a folder containing subfolders or files, for the purposes of this example: `mkdir AB AC AÜ August Oa ÖV Ovation Over`
2. Sort view alphabetically
3. Try selecting the different folders using the keyboard letters. For example, 'AA' will select folder "AC", 'OVE' will select folder "Over".

OBSERVED RESULT
It is not possible to select folders with special characters. Typing 'AU' will select "August". Typing either 'OV' or 'OO' will select "Ovation", jumping over "ÖV" 

EXPECTED RESULT
Characters with modifiers should be treated the same as without for this purpose. Using the last example, typing 'OO' should select 'ÖV'.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.12

ADDITIONAL INFORMATION
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