fix(style): remove tab icon's border when it has focus
fix(style): remove tab icon's border when it has focus

beregovoy68/WavesGUI,wavesplatform/UpcoinWallet,wavesplatform/WavesGUI,beregovoy68/WavesGUI,beregovoy68/WavesGUI,wavesplatform/WavesGUI,wavesplatform/UpcoinWallet,wavesplatform/WavesGUI,beregovoy68/WavesGUI,wavesplatform/WavesGUI