fix toolbar item validation

Author: eyeplum

Countdown/Info.plist

@@ -17,9 +17,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.2.0</string>
+	<string>0.2.1</string>
 	<key>CFBundleVersion</key>
-	<string>4</string>
+	<string>5</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
 	<key>NSHumanReadableCopyright</key>

Countdown/Views/ButtonToolbarItem.swift

@@ -21,6 +21,8 @@ class ButtonToolbarItem: NSToolbarItem {
     }
 
     override func validate() {
-        button?.isEnabled = validator?.validateToolbarItem(self) ?? false
+        let enabled = validator?.validateToolbarItem(self) ?? false
+        isEnabled = enabled
+        button?.isEnabled = enabled
     }
 }