* [MO] : blocknewsletter improvements

More visible information about success or error

![image](https://f.cloud.github.com/assets/2137763/955227/4494a530-0427-11e3-8471-e6a0194f9bfd.png)

![image](https://f.cloud.github.com/assets/2137763/955260/78755476-0427-11e3-9792-c12db38b8b63.png)

![image](https://f.cloud.github.com/assets/2137763/955263/847e62da-0427-11e3-9474-022aabc10b7a.png)