Re-add horizontal align and width to fix #258

Width stuff seems to work (again) but after merging from upstream I get this in the console:  

```
Traceback (most recent call last):
  File "/usr/local/bin/guake", line 427, in reload_accelerators
    self.load_accelerators()
  File "/usr/local/bin/guake", line 495, in load_accelerators
    key, mask = gtk.accelerator_parse(gets('increase_height'))
TypeError: Gtk.accelerator_parse() argument 1 must be string, not None
```