views: Replace self-rolled function for human-readable dates

The list view uses a different date humanization method than what is
shown in the oops-window as "First detected". Reduce complexity and
improve the label in the list view by using the same functionality for
both.

After the turn of the year, problems that occurred a few days ago were
listed as "Last year", which is technically correct, but not very
helpful.

po/POTFILES.in

@@ -7,5 +7,4 @@ src/org.freedesktop.GnomeAbrt.appdata.xml.in
 
 src/gnome_abrt/dbus_problems.py
 src/gnome_abrt/problems.py
-src/gnome_abrt/tools.py
 src/gnome_abrt/views.py

src/gnome_abrt/meson.build

@@ -25,7 +25,6 @@ gnome_abrt_sources = [
   'errors.py',
   'problems.py',
   'signals.py',
-  'tools.py',
   'views.py',
   'l10n.py',
 ]

src/gnome_abrt/views.py

@@ -37,7 +37,6 @@
 
 from gnome_abrt import problems, config, wrappers, errors
 from gnome_abrt.l10n import _, C_, GETTEXT_PROGNAME
-from gnome_abrt.tools import fancydate
 
 class ProblemsFilter:
 
@@ -139,7 +138,7 @@ def problem_to_storage_values(problem):
         problem_type = _("Misbehavior")
 
     return (name,
-            fancydate(problem['date_last']),
+            humanize.naturaltime(datetime.datetime.now()-problem['date_last']),
             problem_type,
             problem['count'],
             problem)