Updated Spanish translation
Add User information config menu in dash and views.

Add error handling message dialogs.
Fix for singular and plural relative time format.

Use TimeSpan class to calculate difference epoch time.
Commits as old as an hour now, read 'An hour ago'.
Commits older than an hour now, read 'N hours ago'.
Commits as old as a day now, read "A day ago".
Commits as older than a day now, read 'N days ago'.
Updated POTFILES.in
Drop spaces before colons in newly added strings
Updated Polish translation
Updated Serbian translation
Better fix for relative time in Gitg

Resolves edge cases of relating to difference in minutes.
Treats minutes and hours in the way for rounding off.
Cleans code readability.