Add script to sync localized strings.xml files with the master file
Move comment so the sync_translation script won't copy it to the output
Move another XML comment
Remove XML comments to work around limitations of sync_translation.py
Move comments that should be preserved when syncing translations
Fix broken XML
Sync translations using the new script
Remove preference summary attribute when empty string was used

This will display the preference title vertically centered. Some
translations still had text for the summary, so their preference title
might need to be changed to adjust for possible loss of information.
Update Russian translation
Update Italian translation

See issue 5748
Merge branch 'master' into wappush