Fix js on mobile login screen — again!
Fix js on mobile login screen — again!

Closes: CORE-3190

This time in a way that will still work when webpack minifies it.

There is some bug in webpack/minify in the prod build where 
`jqueryui/mouse` was not loaded by the time `jquery-ui-touch-punch`
was loaded, even though right on the previous line it has 
`jqueryui/draggable-unpatched` and that file has:
```
import $ from 'jquery'
import 'jqueryui/core'
import 'jqueryui/mouse'
import 'jqueryui/widget'
```

Right at the top of it.

Test plan:
* in a production webpack build (with minified js and stuff)
* go to /login/canvas on a mobile device
* click the “forgot password” link
* it should work

Change-Id: I7e5708ff270ea7102f65d53708768f5ba60d7595
Reviewed-on: https://gerrit.instructure.com/201294
Tested-by: Jenkins
Reviewed-by: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>
QA-Review: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>
Product-Review: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>

djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms