Reduce using qt private classes: QKeyMapper

Your idea

We use the private class QKeyMapper for navigation using symbols in the menu for Windows and Linux. This approach can lead to backward compatibility issues, for example here and here

QKeyMapper is needed to solve the case when the user has switched the keyboard layout to a non-English one and is trying to navigate. A similar problem was solved for shortcuts in MacOS and QKeyMapper was used there before, there too, a decision was made to abandon QKeyMapper - to use native platform tools to solve the problem of translating symbols between layouts.

Most likely, we need to create a KeyMapper class and implement it for all platforms.

Problem to be solved

Reduced using qt private classes

Prior art

No response

Additional context

No response

Checklist

• This request follows the guidelines for reporting issues
• I have verified that this feature request has not been logged before, by searching the issue tracker for similar requests

Start by locating the code that uses Qt's private QKeyMapper for menu navigation on Windows and Linux, then review how the existing macOS shortcut handling replaced it with native platform tools. Done means reducing the QKeyMapper dependency through a KeyMapper implementation for all relevant platforms while preserving navigation across keyboard layouts.