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 or tests are named in the issue. Start by locating the application's theme entry point and how system theme preferences are accessed; the work is done when the application follows the user's existing system theme without conflicting with its own theme.

Written by the indexing model from the issue text.