Clean wrong password (avoid repeated notification)

* Add cursor pointer on notification close icon

background.js

@@ -130,6 +130,7 @@ async function restore(storage)
 	}
 	catch(_error)
 	{
+		state.key = null
 		show_error('Cannot decrypt entries: wrong password')
 	}
 }

manifest.json

@@ -20,5 +20,5 @@
 		"storage",
 		"clipboardWrite"
 	],
-	"version": "1.3.1"
+	"version": "1.3.2"
 }

popup.css

@@ -201,6 +201,7 @@ h2 {
 
 #notification img {
 	height: 1em;
+	cursor: pointer;
 }
 
 #password-container {