Remove Changelog and Download from Settings

Adding in SchismOTA as a shortcut here
Changelog will be something I am thinking about still
Currently, you can access changelog from SchismOTA - just redirects to the website

SchismOTA is pretty much ready for big time now! :D

Cleaning up Settings along with these commits too now

Signed-off-by: Chintan Shah <cgintan1998@gmail.com>