Clicking on the 'Esc' button when editing a discussion asks the user whether to discard the edit or not through the "Are you sure?" modal. The same doesn't happen when creating a new flow topic especially when the topic has been given a title!
=== Steps to reproduce
1. Open [[ https://www.mediawiki.org/wiki/2017_wikitext_editor/Feedback | 2017 wikitext editor/Feedback ]]
1. Click on "Start a new topic"
1. Enter "Test title" in the title space
1. Enter "Lorem ipsom ..." in the topic description space
1. Tap on the 'Esc' key
=== Expected results
The "Are you sure?" modal is shown to ask for user consent whether to discard the change or not.
=== Actual results
The "Are you sure?" modal is **not shown ** to ask for user consent.
=== Note
The "Are you sure?" modal is **shown ** to ask for user consent when the title is not entered (Step 3).
=== Environment details
| **Browser** | Firefox Nightly 60.0a1 |
| **OS** | Debian GNU/Linux 9 (stretch) |
| **Skin** | Vector (default) |