Cosmetic change for the time-to-destination MOD:

- now rounds seconds to nearest 5 seconds, i.e. 23 -> 25, otherwise it updates ridiculously often

- never print spaces around "/" to make it fit better in the widget

- indentation fix

Patch (on top of the last one): http://paste.debian.net/download/179330

I tested the feature this morning and the reported time-to-destination values look correct and update smoothly.