Catch exceptions thrown during GUI initialization.

This is a workaround for an UnsupportedOperationException thrown when using X2Go, due to PERPIXEL_TRANSLUCENT translucency being unsupported in splashDialog.setBackground(). We could choose to use a different version of the splash screen with an opaque background in these cases, but it is low priority.

src/main/java/org/qortal/gui/Gui.java

@@ -23,6 +23,7 @@ public class Gui {
 	private SysTray sysTray = null;
 
 	private Gui() {
+		try {
 			this.isHeadless = GraphicsEnvironment.isHeadless();
 
 			if (!this.isHeadless) {
@@ -35,6 +36,9 @@ public class Gui {
 
 				showSplash();
 			}
+		} catch (Exception e) {
+			LOGGER.info("Unable to initialize GUI: {}", e.getMessage());
+		}
 	}
 
 	private void showSplash() {