[settings,qt] merge of "disable controller applet" toggle with "controller applet mode" picker (#4498)

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
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-------------------
Small good simplification to nuke a toggle which costed me almost an entire day of work when fixing controller applet issues:

There were two settings related to Controller applet:
-"disable controller applet", which is a boolean toggle;
-"controller configuration" applet mode, which is a "Real"/"Custom" picker;

All i did was to nuke the toggle and add a third option "Disabled" to the picker.
Users which used the disable toggle will have to pick Disabled;
Real/Custom settings wont be affected since their indexes remains.
All options tested against diablo 3. All working as intended.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4498
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/yuzu/configuration/configure_applets.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,7 +11,6 @@
 
 class QCheckBox;
 class QLineEdit;
-class QComboBox;
 class QDateTimeEdit;
 namespace Core {
 class System;

src/yuzu/configuration/shared_widget.cpp

@@ -140,7 +140,12 @@ QWidget* Widget::CreateCombobox(std::function<std::string()>& serializer,
     if (combobox_enumerations.contains(type)) {
         enumeration = &combobox_enumerations.at(type);
         for (const auto& [id, name] : *enumeration) {
-            combobox->addItem(name);
+            if (type == Settings::EnumMetadata<Settings::AppletMode>::Index() &&
+                id == static_cast<u32>(Settings::AppletMode::Disabled) &&
+                setting.Id() != Settings::values.controller_applet_mode.Id()) {
+                continue;
+            }
+            combobox->addItem(name, id);
         }
     } else {
         return combobox;
@@ -158,9 +163,8 @@ QWidget* Widget::CreateCombobox(std::function<std::string()>& serializer,
     const u32 setting_value = std::strtoul(setting.ToString().c_str(), nullptr, 0);
     combobox->setCurrentIndex(find_index(setting_value));
 
-    serializer = [this, enumeration]() {
-        int current = combobox->currentIndex();
-        return std::to_string(enumeration->at(current).first);
+    serializer = [this]() {
+        return std::to_string(combobox->currentData().toUInt());
     };
 
     restore_func = [this, find_index]() {

src/yuzu/main_window.cpp

@@ -1786,7 +1786,7 @@ bool MainWindow::LoadROM(const QString& filename, Service::AM::FrontendAppletPar
 
     QtCommon::system->SetFrontendAppletSet({
         std::make_unique<QtAmiiboSettings>(*this), // Amiibo Settings
-        (UISettings::values.controller_applet_disabled.GetValue() == true)
+        (Settings::values.controller_applet_mode.GetValue() == Settings::AppletMode::Disabled)
             ? nullptr
             : std::make_unique<QtControllerSelector>(*this), // Controller Selector
         std::make_unique<QtErrorDisplay>(*this),             // Error Display