It seems the strings in `qt/bitcoin.cpp` are not translated.

E.g. `qt/bitcoin-qt -lang=cz -datadir=/tmp/a2` gives me a warning in English that the datadir does not exist.

QT_TRANSLATE_NOOP("bitcoin-core", "<category> can be:"),
QT_TRANSLATE_NOOP("bitcoin-core", "Accept command line and JSON-RPC commands"),
QT_TRANSLATE_NOOP("bitcoin-core", "Accept public REST requests (default: %u)"),
QT_TRANSLATE_NOOP("bitcoin-core", "Add a node to connect to and attempt to keep the connection open"),
QT_TRANSLATE_NOOP("bitcoin-core", "Allow DNS lookups for -addnode, -seednode and -connect"),
QT_TRANSLATE_NOOP("bitcoin-core", "Always query for peer addresses via DNS lookup (default: %u)"),
QT_TRANSLATE_NOOP("bitcoin-core", "Append comment to the user agent string"),
QT_TRANSLATE_NOOP("bitcoin-core", "Attempt to recover private keys from a corrupt wallet on startup"),
QT_TRANSLATE_NOOP("bitcoin-core", "Automatically create Tor hidden service (default: %d)"),
QT_TRANSLATE_NOOP("bitcoin-core", "Block creation options:"),
QT_TRANSLATE_NOOP("bitcoin-core", "Cannot downgrade wallet"),
QT_TRANSLATE_NOOP("bitcoin-core", "Cannot resolve -%s address: '%s'"),
QT_TRANSLATE_NOOP("bitcoin-core", "Cannot write default address"),
QT_TRANSLATE_NOOP("bitcoin-core", "Change index out of range"),
QT_TRANSLATE_NOOP("bitcoin-core", "Connect through SOCKS5 proxy"),
QT_TRANSLATE_NOOP("bitcoin-core", "Connect to a node to retrieve peer addresses, and disconnect"),
QT_TRANSLATE_NOOP("bitcoin-core", "Connection options:"),
QT_TRANSLATE_NOOP("bitcoin-core", "Copyright (C) %i-%i"),
QT_TRANSLATE_NOOP("bitcoin-core", "Corrupted block database detected"),
QT_TRANSLATE_NOOP("bitcoin-core", "Debugging/Testing options:"),
QT_TRANSLATE_NOOP("bitcoin-core", "Do not load the wallet and disable wallet RPC calls"),
QT_TRANSLATE_NOOP("bitcoin-core", "Do you want to rebuild the block database now?"),
QT_TRANSLATE_NOOP("bitcoin-core", "Done loading"),
QT_TRANSLATE_NOOP("bitcoin-core", "Enable publish hash block in <address>"),
QT_TRANSLATE_NOOP("bitcoin-core", "Enable publish hash transaction in <address>"),
QT_TRANSLATE_NOOP("bitcoin-core", "Enable publish raw block in <address>"),
QT_TRANSLATE_NOOP("bitcoin-core", "Enable publish raw transaction in <address>"),
QT_TRANSLATE_NOOP("bitcoin-core", "Enable transaction replacement in the memory pool (default: %u)"),
QT_TRANSLATE_NOOP("bitcoin-core", "Error initializing block database"),
QT_TRANSLATE_NOOP("bitcoin-core", "Error initializing wallet database environment %s!"),