prevent crash

app/src/main/java/eu/faircode/email/NavMenuItem.java

@@ -87,12 +87,21 @@ public class NavMenuItem {
     }
 
     void onClick() {
+        try {
             click.run();
+        } catch (Throwable ex) {
+            Log.e(ex);
+        }
     }
 
     boolean onLongClick() {
+        try {
             if (longClick != null)
                 longClick.run();
             return (longClick != null);
+        } catch (Throwable ex) {
+            Log.e(ex);
+            return false;
+        }
     }
 }