Show the 'upgradeable' arrow in inventory

What title says.

When we fit a ship that doesn’t have max level modules and we have enough loyalty / creds / iridium to upgrade said modules, there’s this little arrow showing up that tells us we have enough resources to upgrade that module.

Suggestion is to do the same for the inventory items. Having an upgrade kit for Mk1 > Mk2 and Mk3 > Mk4 takes priority, so show those green and purple dots as they are now instead of the arrow if kits are available.