Merge branch '335-report-ui-improvements' into 'master'

UX improvements for crash reports and feedback

(The background color of the first screenshot is white, but I now changed it to use the same background color like everywhere)
![device-2016-08-01-174433](/uploads/a457489f61a7f0af48d4ebf8e3a10bf0/device-2016-08-01-174433.png)![device-2016-08-01-174500](/uploads/5275bff37db5a35e9ac9ad5038c06142/device-2016-08-01-174500.png)![device-2016-08-01-174532](/uploads/d0281156feff94262789102bd420ffeb/device-2016-08-01-174532.png)![device-2016-08-01-180330](/uploads/ed2d2d35b465df22b717cb84567a555f/device-2016-08-01-180330.png)

Closes #335

See merge request !246