fix: resolve -Wmissing-field-initializers warnings

Author: kwvg

src/qt/networkstyle.cpp

@@ -24,9 +24,9 @@ static const struct {
     const std::string titleAddText;
 } network_styles[] = {
     {"main", QAPP_APP_NAME_DEFAULT, 0, 0, ""},
-    {"test", QAPP_APP_NAME_TESTNET, 190, 20},
+    {"test", QAPP_APP_NAME_TESTNET, 190, 20, ""},
     {"devnet", QAPP_APP_NAME_DEVNET, 190, 20, "[devnet: %s]"},
-    {"regtest", QAPP_APP_NAME_REGTEST, 160, 30}
+    {"regtest", QAPP_APP_NAME_REGTEST, 160, 30, ""}
 };
 
 void NetworkStyle::rotateColor(QColor& col, const int iconColorHueShift, const int iconColorSaturationReduction)