STORM-563 FIXED Updated all localized XUI strings and notifications templates to use display names.

Previously name substitutions were broken, so "[FIRST] [LAST]" was displayed instead of avatar name.
Some of the affected notifications:
* avatar went online/offline notification
* object return notification
* calling card offer
* script dialog
* auto-unmute notification.
See the diff for more details.

The fixes apply to all locales but English (which is already correct).

Besides, I fixed calling card offer notification to display avatar name correctly. It was broken even in English.