Improvements

Use native tools to scan installed applications
Use native tools to scan system preferences on macOS
Use native tools to scan files and folers in Simple folder search plugin
Only regenerate app icons which don't exist yet
Shortcuts: use execution argument as fallback description if there is no description
Added indicator to main window if app is currently rescanning
Added option to turn off native icons (might result in better rescan performance)
Added Windows operating system command "Hibernate" (#191)
Added better debug messages

Misc