[1841] Liquidity fails to exclude shares of new Non-historical companies

[physic]

https://18xx.games/game/132855?action=816

Here are 5 scenarios where a share is not liquid.

President's Cert that may not be dumped: Correct
Shares that may not be sold due to 50% pool limit: Correct
Historical Company just parred: Correct
Non-historical Company just parred: Not accounted for.
Merged company has not operated yet: Not accounted for.

In the attached game state, Alexfrog's Liquidity is calculated to be his entire net worth, even though the IFAI share has never operated and may not be sold. Furthermore, having a player float a company and buy 4 shares at 68, you will see their liquidity is reduced by only L.136 (for the illiquid Pres.Cert) when it should be reduced by L.272