System and Application Theme

Is your feature request related to a problem? Please describe.
System theme and Enatega Application theme is contradicting with each other.

Describe the solution you'd like
When the user install the enatega application and uses it, the application should be able to pick whichever theme system is already using.

No files, tests, or entry points are named. Start by locating the Enatega application's theme handling and how it detects the device system theme; done means the installed application follows the system's selected theme instead of contradicting it.

Written by the indexing model from the issue text.