Show an OSD notification when 'Stop after this track' is toggled
Fix comments and reduce translator's burden.
Move the emission of the signal StopAfterToggled to MainWindow::StopAfterCurrent.
Added the Psychedelic preset

The Psychedelic preset can also be used with similar genres like DarkPsy, PsyTrance, and Psybreaks. This preset may even enhance Psybient music. Generally, any type of Psy* fan will know this preset is intended for their genre.
Merge pull request #4080 from DevynCJohnson/patch-1

Added the Psychedelic preset
Merge pull request #4076 from paperbagcorner/osdstopaftertrack

Show an OSD notification when 'Stop after this track' is toggled