UI adjustments


![screen shot 2014-11-03 at 10 16 38 am](https://cloud.githubusercontent.com/assets/5606182/4887695/e274a77c-6386-11e4-9fda-5ac4297d86c5.png)
@devoncarew 

* Made the "New Project" FAB smaller: in-sync with other buttons + works towards fixing #3642 
* Made the font in the status message 1px smaller: virtually fixes #3642 
* Moved the in-editor FABs ("Preview markdown" and "Open in PD") to the right-bottom corner to avoid overlapping with the Search/Replace dialog.