Maintenance engine update

Now with horizontal layout mode option (on by default), as well as various other small quality of life tweaks.

• Color customization & dark mode
• Slightly reworked layout to be sleeker on devices with a 16:9 aspect ratio
• Slightly streamlined menus
• 6. and 9. life values are now displayed with the dot

• Added small input deadzones at the edges of the screen to avoid unwanted inputs when using system gestures