Qt: Add 'Open Directory' button to post-processing settings

src/duckstation-qt/postprocessingchainconfigwidget.ui

@@ -45,6 +45,16 @@
        </property>
       </spacer>
      </item>
+     <item>
+      <widget class="QPushButton" name="openDirectory">
+       <property name="text">
+        <string>Open Directory</string>
+       </property>
+       <property name="icon">
+        <iconset theme="folder-open-line"/>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QPushButton" name="reload">
        <property name="text">
@@ -185,7 +195,7 @@
         <x>0</x>
         <y>0</y>
         <width>630</width>
-        <height>237</height>
+        <height>246</height>
        </rect>
       </property>
      </widget>
@@ -207,7 +217,7 @@
   </layout>
  </widget>
  <resources>
-  <include location="resources/resources.qrc"/>
+  <include location="resources/duckstation-qt.qrc"/>
  </resources>
  <connections/>
 </ui>

src/duckstation-qt/postprocessingsettingswidget.cpp

@@ -3,6 +3,7 @@
 
 #include "postprocessingsettingswidget.h"
 #include "qthost.h"
+#include "qtutils.h"
 #include "settingswindow.h"
 #include "settingwidgetbinder.h"
 
@@ -81,6 +82,8 @@ void PostProcessingChainConfigWidget::triggerSettingsReload()
 void PostProcessingChainConfigWidget::connectUi()
 {
   connect(m_ui.reload, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onReloadButtonClicked);
+  connect(m_ui.openDirectory, &QPushButton::clicked, this,
+          &PostProcessingChainConfigWidget::onOpenDirectoryButtonClicked);
   connect(m_ui.add, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onAddButtonClicked);
   connect(m_ui.remove, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onRemoveButtonClicked);
   connect(m_ui.clear, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onClearButtonClicked);
@@ -270,6 +273,11 @@ void PostProcessingChainConfigWidget::onReloadButtonClicked()
   g_emu_thread->reloadPostProcessingShaders();
 }
 
+void PostProcessingChainConfigWidget::onOpenDirectoryButtonClicked()
+{
+  QtUtils::OpenURL(this, QUrl::fromLocalFile(QString::fromStdString(EmuFolders::Shaders)));
+}
+
 void PostProcessingChainConfigWidget::onSelectedShaderChanged()
 {
   std::optional<u32> index = getSelectedIndex();

src/duckstation-qt/postprocessingsettingswidget.h

@@ -51,6 +51,7 @@ private:
   void onMoveUpButtonClicked();
   void onMoveDownButtonClicked();
   void onReloadButtonClicked();
+  void onOpenDirectoryButtonClicked();
   void onSelectedShaderChanged();
   void triggerSettingsReload();