Qt: Add log window

src/core/guncon.cpp

@@ -295,7 +295,7 @@ static const SettingInfo s_settings[] = {
   {SettingInfo::Type::String, "CrosshairColor", TRANSLATE_NOOP("GunCon", "Cursor Color"),
    TRANSLATE_NOOP("GunCon", "Applies a color to the chosen crosshair images, can be used for multiple players. Specify "
                             "in HTML/CSS format (e.g. #aabbcc)"),
-   "#ffffff"},
+   "#ffffff", nullptr, nullptr, nullptr, nullptr, nullptr, 0.0f},
   {SettingInfo::Type::Float, "XScale", TRANSLATE_NOOP("GunCon", "X Scale"),
    TRANSLATE_NOOP("GunCon", "Scales X coordinates relative to the center of the screen."), "1.0", "0.01", "2.0", "0.01",
    "%.0f%%", nullptr, 100.0f}};