Feat: Theme support

[ashiishme]

Is your feature request related to a problem? Please describe. The current UI doesn't supports any other theme to switch the color based on user taste. This is a new feature request that will allow users to switch the color.

Describe the solution you'd like Add a setting option to let user select the color. The setting component must be separated from the status component.

Additional context To make this feature request more easy to understand. I have attached a gif that demonstrate the requirement.

Note: This feature shown on gif is already implemented but not patched yet. I would be happy to override it with your contribution.

Happy Hacktoberfest 2020.