Remove post from the mobile site

# Remove posts

![pantallazo](https://f.cloud.github.com/assets/1108789/977182/29588858-069e-11e3-82c3-b0a099028818.png)

One feature https://github.com/diaspora/diaspora/issues/4225

# Remove conversations

![pantallazo-1](https://f.cloud.github.com/assets/1108789/977453/453fb086-06a4-11e3-8b37-fa6cee4235d6.png)

Another feature https://github.com/diaspora/diaspora/issues/4225