Keyboard Manager: Bugs in the new update

### Microsoft PowerToys version

v0.98.0

### Installation method

PowerToys auto-update

### Area(s) with issue?

Keyboard Manager

### Steps to reproduce

The keyboard shortcuts I assigned were working great, and today I went into the application to assign a new shortcut and saw there was an update, so I started the update. After the update, all my old shortcuts broke; they started running other things instead of the functions I added, or they didn't work at all. Also, the shortcut adding menu became more complicated; the old one was much better. Furthermore, the program I wanted to add as a shortcut is fully visible but doesn't show up in the browse section. Even if I added it, it probably wouldn't work anyway. The changes made to the keyboard manager in the last update are a complete disappointment, nothing else.

### ✔️ Expected Behavior

Adding new keyboard shortcuts and ensuring they work correctly.

### ❌ Actual Behavior

The keyboard manager, which was working fine before the last update, is now completely unusable.

### Upload Bug Report ZIP-file

_No response_

### Additional Information

Windows 11 home

### Other Software

_No response_

Start by reproducing the reported Keyboard Manager regression on PowerToys v0.98.0 after auto-update, using the shortcut mappings, shortcut editor, and browse section described in the issue. Compare behavior before and after assigning shortcuts and verify that existing mappings run the intended functions and that programs visible in the UI can be selected.

Written by the indexing model from the issue text.