Enable translation of stats strings (close federicoiosue#296)

Manually handled pull request inclusion

etc/translations/strings.xml

@@ -330,6 +330,30 @@
     <string name="settings_send_analytics_summary">Help the developer by sending non-sensitive data like device model, language, frequently used app\'s features. This data are used only to improve the open-source app.</string>
     <string name="settings_statistics">Statistics</string>
 
+    <!-- Stats -->
+    <string name="stats_total_notes">Total notes</string>
+    <string name="stats_active_notes">Active notes</string>
+    <string name="stats_archived_notes">Archived notes</string>
+    <string name="stats_trashed_notes">Trashed notes</string>
+    <string name="stats_reminders">Reminders</string>
+    <string name="stats_future_reminders">Future reminders</string>
+    <string name="stats_checklists">Checklists</string>
+    <string name="stats_locked_notes">Locked notes</string>
+    <string name="stats_categories">Categories</string>
+    <string name="stats_tags">Tags</string>
+    <string name="stats_attachments">Attachments</string>
+    <string name="stats_images">Images</string>
+    <string name="stats_videos">Videos</string>
+    <string name="stats_audio_recordings">Audio recordings</string>
+    <string name="stats_sketches">Sketches</string>
+    <string name="stats_files">Files</string>
+    <string name="stats_locations">Locations</string>
+    <string name="stats_words">Words</string>
+    <string name="stats_max_words">Max words</string>
+    <string name="stats_avg_words">Average words</string>
+    <string name="stats_characters">Chars</string>
+    <string name="stats_max_characters">Max chars</string>
+    <string name="stats_avg_characters">Average chars</string>
 
     <!-- Instructions -->
     <string name="tour_request_start">You launched Omni Note for the first time, would you like to take the application tour?</string>