Minecraft Host 1.2.6 – Dialogs close properly

Dialogs close properly, clearer small text.

• Escape closes every dialog (a click outside already did), and the start animation can be ended with a click or Escape; it also ends after 5 seconds instead of 12.
• Better contrast for small text and an even top row; the page no longer scrolls behind an open dialog.
• The website shows a sharp preview video and screenshots, and its music only plays after pressing the music button.

See SHA256SUMS.txt for the checksums.