PSThar's ForEach-LevelTile command creates a new scope

I noticed while writing PSThar scripts, most recently this one, that the ForEach-LevelTile cmdlet (abbreviated %t) has different scoping behavior than the normal PowerShell ForEach-Object (abbreviated %). The script block that runs for each level tile is more of a distinct scope from the parent than is the script block run for each object by %. Using variables from outside the %t block in the block pretty much requires explicitly scoping those variables with script: every time they're mentioned, otherwise the variable name inside the block doesn't refer to the variable of the same name outside the block. This is very inconvenient and I will look into tweaking PSThar to fix it.