Fix dolphin open panel filter, force X11 on linux launcher

src/Editor/CQuickplayPropertyEditor.cpp

@@ -74,7 +74,7 @@ CQuickplayPropertyEditor::~CQuickplayPropertyEditor()
 
 void CQuickplayPropertyEditor::BrowseForDolphin()
 {
-    QString Path = UICommon::OpenFileDialog(this, "Open Dolphin", "Dolphin");
+    QString Path = NDolphinIntegration::AskForDolphinPath(this);
 
     if (!Path.isEmpty())
     {

src/Editor/NDolphinIntegration.cpp

@@ -95,7 +95,7 @@ EQuickplayLaunchResult LaunchQuickplay(QWidget* pParentWidget,
         if (Path.isEmpty())
         {
             // Allow the user to select the Dolphin exe.
-            Path = UICommon::OpenFileDialog(pParentWidget, "Open Dolphin", "Dolphin");
+            Path = AskForDolphinPath(pParentWidget);
         }
 
         bool bGotDolphin = (!Path.isEmpty() && SetDolphinPath(pParentWidget, Path, true));
@@ -331,6 +331,19 @@ QString GetDolphinPath()
     return Path;
 }
 
+QString AskForDolphinPath(QWidget* pParentWidget) {
+#if Q_OS_WIN
+    QString Path = UICommon::OpenFileDialog(pParentWidget, "Open Dolphin", "*.exe");
+#elif Q_OS_MACOS
+    QString Path = UICommon::OpenFileDialog(pParentWidget, "Open Dolphin", "*.app");
+    if (Path.endsWith(".app"))
+        Path += "/Contents/MacOS/Dolphin";
+#else
+    QString Path = UICommon::OpenFileDialog(pParentWidget, "Open Dolphin", {});
+#endif
+    return Path;
+}
+
 /** Saves/retrieves the given quickplay settings to/from QSettings. */
 void SaveQuickplayParameters(const SQuickplayParameters& kParms)
 {

src/Editor/NDolphinIntegration.h

@@ -116,6 +116,9 @@ bool SetDolphinPath(QWidget* pParentWidget,
 /** Retrieves the user path to Dolphin. */
 QString GetDolphinPath();
 
+/** Prompt user to select dolphin binary. */
+QString AskForDolphinPath(QWidget* pParentWidget);
+
 /** Saves/retrieves the given quickplay settings to/from QSettings. */
 void SaveQuickplayParameters(const SQuickplayParameters& kParms);
 void LoadQuickplayParameters(SQuickplayParameters& Parms);

src/Editor/icons/freedesktop/applications/io.github.arukibree.PrimeWorldEditor.desktop

@@ -2,7 +2,7 @@
 Name=Prime World Editor
 GenericName=Game Data Editor
 Comment=Edit world assets from games by Retro Studios
-Exec=PrimeWorldEditor
+Exec=env QT_QPA_PLATFORM=xcb PrimeWorldEditor
 Icon=PrimeWorldEditor
 Terminal=false
 Type=Application