v3.0.4 patch

A few bug fixes. Thank you for the reports. :)

Glad to see everybody enjoying the new expansion!

[h3]Changelog[/h3]

• Fixed bug: you could place Jetty and Bridge tanks over bridges.
  
• Fixed bug: Tanks not being visited under certain conditions.
  
• Balance: In Full Unlock mode in Sandbox, objective difficulty is tied to your rank even though you have access to everything.