Battery saver detection and improvements

Lively v1.0 onwards REQUIRE Windows 10 version 1903 or above.

What's new in v1.7.2.0:

• New wallpaper playback options under performance menu.
  Power saving mode/Battery saver wallpaper pause.
  #744
  Remote desktop wallpaper pause.
• Fixed unable to select desktop icons when using webpage wallpapers.
  #683
• mpv player will now skip global config file if present.
  #670
• Additional safety checks added to detect failure.
  Lively will self terminate if explorer crashes more than once in 30s.
  Fixed an issue where wallpapers appears infront covering desktop.
• Disabled lockscreen wallpaper option due to reported bugs.
• Performance improvements and fixes.
• Updated .net core runtime v3.1.19.
  May require a system restart after update.
• Updated dependent libraries.
• Updated CefSharp browser.
• Updated mpv player.
• Updated language translations.

Note:

• Lively v1.7.0.2 onwards requires updated Lively command-utility for continued functioning.