Xiaomi Mi Box Beta 3

Xiaomi Mi Box Beta 3

Changes:

• Default event changed for Mi Box S from event3 to event2. This could have been the cause of the report from @moh-Brent in #55 that the "apps-button" was not doing anything
• On the topic of the apps button not working, I replaced the Xiaomi command tied to that button with an adb start command which does not require a proper "event" number to be selected, and is faster than a "Strong" config. Hopefully I've double solved this issue.
• Adjusted the launch command for the emby app as reported by @ChristophCaina in #18 to be problematic. This change should make it more stable and even faster for everyone who uses it.
• Adjusted the launch command for Magenta TV as reported by @ChristophCaina in #58. This needs testing/confirmation.
• Added a confirmation dialog before executing a function: restart button press command as noted by @moh-Brent in #55 (good call Kiwi)

Not finished yet:

• nothing! (let me know if I missed something)

Full Changelog: v2.1.0-beta2...v2.1.0-beta3