Changed UI. See description

- Make image smaller
- Add more dividers
- Move image to where it's relevant
Improved UI

- Added 'General' header
- Change margins
Disable buttons if option is not enabled

- Reordered some lines
Rename variables
Split method
Rename methods to more relevant names

- And reorder methods
Rename main fragment
Use 'include' tag to make XML more readable
Remove unused string
Fix string comparison