configuration_shared: Use a highlight instead of background color

Fixes visibility in the built-in dark theme

src/yuzu/configuration/configuration_shared.cpp

@@ -85,11 +85,11 @@ void ConfigurationShared::SetPerGameSetting(
                                                            ConfigurationShared::USE_GLOBAL_OFFSET);
 }
 
-void ConfigurationShared::SetBGColor(QWidget* widget, bool highlighted) {
+void ConfigurationShared::SetHighlight(QWidget* widget, bool highlighted) {
     if (highlighted) {
-        widget->setStyleSheet(QStringLiteral("background-color:rgba(0,203,255,0.5);"));
+        widget->setStyleSheet(QStringLiteral("border:2px solid;border-color:rgba(0,203,255,0.5);"));
     } else {
-        widget->setStyleSheet(QStringLiteral("background-color:rgba(0,0,0,0);"));
+        widget->setStyleSheet(QStringLiteral("border:2px solid;border-color:rgba(0,0,0,0);"));
     }
     widget->show();
 }
@@ -101,13 +101,13 @@ void ConfigurationShared::SetColoredTristate(QCheckBox* checkbox, Settings::Sett
     } else {
         tracker = (setting.GetValue() == setting.GetValue(true)) ? CheckState::On : CheckState::Off;
     }
-    SetBGColor(checkbox, tracker != CheckState::Global);
+    SetHighlight(checkbox, tracker != CheckState::Global);
     QObject::connect(checkbox, &QCheckBox::clicked, checkbox, [checkbox, setting, &tracker]() {
         tracker = static_cast<ConfigurationShared::CheckState>((tracker + 1) % CheckState::Count);
         if (tracker == CheckState::Global) {
             checkbox->setChecked(setting.GetValue(true));
         }
-        SetBGColor(checkbox, tracker != CheckState::Global);
+        SetHighlight(checkbox, tracker != CheckState::Global);
     });
 }
 

src/yuzu/configuration/configuration_shared.h

@@ -45,7 +45,7 @@ void SetPerGameSetting(QComboBox* combobox,
 void SetPerGameSetting(QComboBox* combobox,
                        const Settings::Setting<Settings::GPUAccuracy>* setting);
 
-void SetBGColor(QWidget* widget, bool highlighted);
+void SetHighlight(QWidget* widget, bool highlighted);
 void SetColoredTristate(QCheckBox* checkbox, Settings::Setting<bool>& setting,
                         ConfigurationShared::CheckState& tracker);