Fix #16 - Add widget theme files to support custom console background
Based on the files in the Spacegray theme (kkga/spacegray) I created
widget files to set the background for the console, this also has the
side effect of changing the background for text inputs. I couldn't find
a way to override this for text inputs, so I adjusted the background of
the text inputs to be the same dark blue that is used for the background
of the find/replace panel, this is also what Spacegray does.