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.

Start by locating the application's theme configuration and the entry point where user preferences are initialized. Check how the app currently chooses its theme, then verify that a fresh installation follows the device's system theme and that the two themes no longer conflict.

Written by the indexing model from the issue text.