provide useful error message instead of hiding the Submit button
With the Locus Map (Android app) help system which is based on usersponse.com services, the Submit button is hidden until the Category combobox is changed from default Uncategorized. This is confusing as sometimes no category is relevant. Instead allow the user to click the Submit but then display an error message that a category must be selected or "Please fill in the required fields". The current behavior is inconsistent because the Submit button is still visible when Title or description or Application fields are empty.
Even your own ticketing system Product combobox can be left as the default Uncategorized but the Submit button remains visible.