Fix Bug - Dark Mode State

[MichalPorag]

Steps for reproduction:

1. Clear the 'theme' key in your Local Storage.
2. Click on the moon icon in the top right corner of your screen.

The moon icon changed to the sun icon; however, the theme didn't change.

Desired result:
After cleaning the key in the Local Storage, show the sun icon and click change to the light theme.

[casasmartinignacio]

Hi! I can take this issue. I already fix the bug locally. Please pick me and i will send the pr

[rinaok]

@MichalPorag Hey :) Can I take this issue?