Bug fixes, minor UI changes and new installer

• Fix 'System' theme doesn't follow system
• Fix muted athan plays on next start
• Fix time not updated on tooltip
• Allow exiting fullscreen during first onboarding
• Prevent texts running into each other and overflowing around
• Updates to android build

• Improve the looks of the main page
• Monochrome tray icon
• Two more built-in athans including fajr athan

• Munadi can now be installed using a self-extracting installer. No need for downloading loads of dependencies, just make it executable (chmod +x) and run the interactive installer. That's it! If you want to try it out, the latest version of the installer is available at https://gitlab.com/munadi/munadi/pkg/makeself