qt tray tooltip: don't include wallet balance
qt tray tooltip: don't include wallet balance

closes https://github.com/spesmilo/electrum/issues/5665

wakiyamap/electrum-mona,spesmilo/electrum,wakiyamap/electrum-mona,wakiyamap/electrum-mona,pooler/electrum-ltc,pooler/electrum-ltc,spesmilo/electrum,spesmilo/electrum,wakiyamap/electrum-mona,pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc