Steps to Reproduce:
1. Go here: https://cs.m.wikipedia.org/wiki/Kosovská_republika#/talk/4
2. Add comment.
3. Click Back button (upper left).
Actual Results:
Sytem warns me, that my changes will be discard, but changes are published (and changes can't be discard).
= Developer notes
When the textarea is focused on the reply form in https://en.m.wikipedia.beta.wmflabs.org/wiki/Kosovsk%C3%A1_republika#/talk/4 and you CLICK the back button - a js error appears in console:
```
VM69:110 Uncaught TypeError: e is not a function
at v.onBeforeExit (<anonymous>:110:261)
at v.onExitClick (load.php?lang=en&modules=jquery|mobile.startup|skins.minerva.mainMenu.styles|skins.minerva.options%2Cscripts%2Ctalk&skin=minerva&version=1tea4he:165)
at HTMLDivElement.dispatch (load.php?lang=en&modules=jquery|mobile.startup|skins.minerva.mainMenu.styles|skins.minerva.options%2Cscripts%2Ctalk&skin=minerva&version=1tea4he:69)
at HTMLDivElement.elemData.handle (load.php?lang=en&modules=jquery|mobile.startup|skins.minerva.mainMenu.styles|skins.minerva.options%2Cscripts%2Ctalk&skin=minerva&version=1tea4he:65)
```