Enabled multiple selection of memos in the memo chooser

![icon](https://f.cloud.github.com/assets/777919/133888/ca661716-70b6-11e2-9512-827f100ce4d5.png) and some other really tiny things ![icon](https://f.cloud.github.com/assets/777919/133888/ca661716-70b6-11e2-9512-827f100ce4d5.png)