Messaging fixes

- messages must specify they are pinnable (prevents banner messages being pinnacle by default - was knackering the smart app message)
- style fixes to smart app banner on tablets (hides batwing)

![screen shot 2014-08-18 at 13 45 18](https://cloud.githubusercontent.com/assets/867233/3951393/c3047fea-26d5-11e4-85f6-34ca9a00a654.png)
- makes messaging copy/calls to action consistent (fixes #5605) and elevates the position of feedback

![screen shot 2014-08-18 at 13 46 22](https://cloud.githubusercontent.com/assets/867233/3951397/c7becd4c-26d5-11e4-9a8a-0dc39899df4a.png)
![screen shot 2014-08-18 at 13 45 43](https://cloud.githubusercontent.com/assets/867233/3951398/c7d48128-26d5-11e4-991f-606d2eb5a9dd.png)