fixes for the update and editing dictionaries
minor fixes for Backup
Phrases "Next step", "Yes" and "Clean" replaced with "Continue to the next step"
fix for an empty translation in "abbr"
new translation
Translations for 1.8.8
Better URI for dictionaries
minor fixes for caching sql
added Rwanda (Kinyarwanda) to the list of supported languages of interface.
fixed issues with session cookie