Bug 502312

SUMMARY
Before Plasma 6.3 when editing applications in app menu it opened a different menu, which had quite a lot of features that are currently missing in kmenuedit. For example:
- Viewing what MIME types are using the app
- Forcing app to use dGPU: https://www.reddit.com/r/kde/comments/xd0hw0/theres_no_option_to_run_apps_using_the_dedicated/ | https://www.reddit.com/r/kde/s/pJcmjLWCSM
- Ability to assign or remove a MIME type for the app
- There's no information about where desktop file for the app is stored


STEPS TO REPRODUCE
1. View properties of a desktop file
2. "Edit application..." on an app in app menu

OBSERVED RESULT
Editing application entry from app menu have cut functionality compared to the properties of the desktop file, which was the way to edit application entries before Plasma <6.3

EXPECTED RESULT
Parity in functionality between desktop file properties and kmenuedit, or at least an indicator of where the desktop file of an app is stored for editing it manually

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
Kernel Version: 6.14.0-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600H with Radeon Graphics
Memory: 13.5 GiB of RAM
Graphics Processor 1: AMD Radeon Graphics
Graphics Processor 2: NVIDIA GeForce RTX 3060 Laptop GPU

ADDITIONAL INFORMATION