SUMMARY In kcm_autostart's +Add Application... Choose Application dialog, you have to double-click to open the categories and choose a program, but if you browse the file system, a single click opens folders and chooses an application (if you haven't changed KDE's General Behavior "Clicking files or folders"). STEPS TO REPRODUCE 1. Run System Settings > Startup and Shutdown > Autostart, click [+ Add...] > [+Add Application...] 2. Choose a program by navigating the categories 3. Cancel and repeat, this time choosing a program by browsing the file system. OBSERVED RESULT Navigating the categories requires double-clicking to open a category and to select a program, even if Systems Settings > Workspace Behavior > General Behavior is "Clicking files or folders" "Opens them" which is the default. EXPECTED RESULT Category navigation should match the "Clicking files of folders" behavior from General Behavior. SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 , 64-bit Wayland ADDITIONAL INFORMATION The Choose Application dialog is implemented by kio which seems to hardcode the double-click behavior, https://invent.kde.org/frameworks/kio/-/blob/master/src/widgets/kopenwithdialog.cpp#L736 . I don't know what other compoments use this KOpenWithDialog() dialog.
Expanding the categories on single click seems reasonable to me
A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kio/-/merge_requests/468
Git commit e2ea079f3a1634c847ffec2589ecc6e2b1737cdd by Ahmad Samir. Committed on 03/06/2021 at 18:02. Pushed by ahmadsamir into branch 'master'. KOpenWithDialog: expand category on selection When a user selects a category in the dialog, it should be expanded. FIXED-IN: 5.83 M +11 -7 src/widgets/kopenwithdialog.cpp https://invent.kde.org/frameworks/kio/commit/e2ea079f3a1634c847ffec2589ecc6e2b1737cdd