#### Expected behavior
I was expecting that when I enable Dark theme option, blacks theme should appear and the white theme should be displayed when I disable the Dark theme option.
#### Actual behavior
when I enable or disable Dark them option every time showing black theme, The Dark theme option is not working properly
#### How to reproduce
* open the [application](https://play.google.com/store/apps/details?id=com.punksta.apps.volumecontrol)
* Enable and disable the Dark theme option
* Note the Error
* Browser/App version: 2.2.0
* Operating system: 6.0
#### Recording Of The Bug
![20190705_114001](https://user-images.githubusercontent.com/51118734/60703507-d7024f00-9eb6-11e9-921e-cdc0f520fbfc.gif)
https://play.google.com/store/apps/details?id=com.punksta.apps.volumecontrol.