yuzu/configuration/configure_mouse_advanced: Specify string conversions explicitly

Allows the advanced mouse configuration code to build with implicit
string conversions disabled.

src/yuzu/configuration/configure_mouse_advanced.cpp

@@ -25,7 +25,7 @@ static QString GetKeyName(int key_code) {
     case Qt::Key_Alt:
         return QObject::tr("Alt");
     case Qt::Key_Meta:
-        return "";
+        return {};
     default:
         return QKeySequence(key_code).toString();
     }
@@ -34,24 +34,36 @@ static QString GetKeyName(int key_code) {
 static QString ButtonToText(const Common::ParamPackage& param) {
     if (!param.Has("engine")) {
         return QObject::tr("[not set]");
-    } else if (param.Get("engine", "") == "keyboard") {
+    }
+
+    if (param.Get("engine", "") == "keyboard") {
         return GetKeyName(param.Get("code", 0));
-    } else if (param.Get("engine", "") == "sdl") {
+    }
+
+    if (param.Get("engine", "") == "sdl") {
         if (param.Has("hat")) {
-            return QString(QObject::tr("Hat %1 %2"))
-                .arg(param.Get("hat", "").c_str(), param.Get("direction", "").c_str());
+            const QString hat_str = QString::fromStdString(param.Get("hat", ""));
+            const QString direction_str = QString::fromStdString(param.Get("direction", ""));
+
+            return QObject::tr("Hat %1 %2").arg(hat_str, direction_str);
         }
+
         if (param.Has("axis")) {
-            return QString(QObject::tr("Axis %1%2"))
-                .arg(param.Get("axis", "").c_str(), param.Get("direction", "").c_str());
+            const QString axis_str = QString::fromStdString(param.Get("axis", ""));
+            const QString direction_str = QString::fromStdString(param.Get("direction", ""));
+
+            return QObject::tr("Axis %1%2").arg(axis_str, direction_str);
         }
+
         if (param.Has("button")) {
-            return QString(QObject::tr("Button %1")).arg(param.Get("button", "").c_str());
+            const QString button_str = QString::fromStdString(param.Get("button", ""));
+
+            return QObject::tr("Button %1").arg(button_str);
         }
-        return QString();
-    } else {
-        return QObject::tr("[unknown]");
+        return {};
     }
+
+    return QObject::tr("[unknown]");
 }
 
 ConfigureMouseAdvanced::ConfigureMouseAdvanced(QWidget* parent)