enabled image auto size of tray icon (only linux should have an effect)

main/ui/src/main/java/org/cryptomator/ui/traymenu/TrayIconController.java

@@ -32,6 +32,7 @@ public class TrayIconController {
 	public void initializeTrayIcon() {
 		macFunctions.map(MacFunctions::uiAppearance).ifPresent(uiAppearance -> uiAppearance.addListener(this::macInterfaceThemeChanged));
 
+		trayIcon.setImageAutoSize(true);
 		if (SystemUtils.IS_OS_WINDOWS) {
 			trayIcon.addActionListener(trayMenuController::showMainWindow);
 		}