Shake time behavior for when garbage is landing while the screen is already shaking.

[jon12156]

if a garbage block "B" lands on a garbage block "A" whose shake is not yet complete, that garbage block B restarts the shake time, with the greater of initial time to shake of A or B, and any subsequent garbage block C that lands before B's shake time is done will yet again restart the shake time, with the greater of C's shake time or the time B was initially set to shake for, even if B's shake time was inherited from A

[jon12156]

Video demonstrating this: https://cdn.discordapp.com/attachments/337083422659051522/369288222024531979/2017-10-15_18-53-53-1.mp4