Using a Bitcoin-Qt v0.16.0 ([downloaded from bitcoin page](https://bitcoin.org/bin/bitcoin-core-0.16.0/bitcoin-0.16.0-osx.dmg)) in an macOS High Sierra 10.13.4 

When I start after a fresh install Bitcoin-Qt as a mainnet node and wallet, the wallet prompt that about 203gb is going to be used in my disk
![image](https://user-images.githubusercontent.com/20187136/39899688-ba820bfe-5493-11e8-87d9-460ed5716a02.png)

When I start the node and wallet as testnet, shows the same message about the 203gb disk usage
![image](https://user-images.githubusercontent.com/20187136/39899756-17b31214-5494-11e8-8a57-60e604e74afb.png)

It seems that the second time the message is wrong, due that the testnet database uses about 14gb.
virtual std::string getWarnings(const std::string& type) = 0;
    
    virtual uint32_t getLogCategories() = 0;
    
    virtual bool baseInitialize() = 0;
    
    virtual bool appInitMain() = 0;
    
    virtual void appShutdown() = 0;
    
    virtual void startShutdown() = 0;
    
    virtual bool shutdownRequested() = 0;
    
    virtual void setupServerArgs() = 0;
    
    virtual void mapPort(bool use_upnp) = 0;
    
    virtual bool getProxy(Network net, proxyType& proxy_info) = 0;
    
    virtual size_t getNodeCount(CConnman::NumConnections flags) = 0;
    
    using NodesStats = std::vector<std::tuple<CNodeStats, bool, CNodeStateStats>>;
    virtual bool getNodesStats(NodesStats& stats) = 0;
    
    virtual bool getBanned(banmap_t& banmap) = 0;
    
    virtual bool ban(const CNetAddr& net_addr, BanReason reason, int64_t ban_time_offset) = 0;
    
    virtual bool unban(const CSubNet& ip) = 0;