Update 0.4.7

+Added 3-Week Operational Expense to the node financial tab
+Added Last Dividend Payment to the node financial tab
*Replaced Average Revenue with Net Revenue in the node financial tab
*Retail nodes will now always sell for max price
*Retail nodes no longer need to set their margins
*Cities no longer care about their weekly budget (which was never being met in-game anyway)
*Cities maximum order quantity is now tied to their population
*Fixed margin sell price display showing the wrong number
*Removed internally tracking what office a node was built from
*Fixed an issue that would not allow new offices to be built if they weren't within the range of another office
*Removed several unnecessary RPC calls to reduce network congestion
*Consolidated the tech tree into fewer total taps, still separated by industry
*Fixed closing a window without using [x] not allowing that window to be reopened