[FeatureRequest] Automatic Close Amarok App when the hidden state activated

[linkt218]

Feature Description / 功能描述
Thanks for the great app, i would would like this feature to be added when the hidden states avitivated from the notification bar or other hidden activation methods

Reason / 理由
Because i have to manually close the app and not to be shown in the resent android open window

Suggest Solution / 实现方案
The same method applies to the hidden app when they disappear from the resently open app