Update typolight27 package to 2.7.3.

Version 2.7.3 (2009-09-06)
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- Added dynamic spellchecker languages to TinyMCE
- Added pseudo entities [{] and [}] to output insert tags
- Fixed issue with breadcrumb menu not handling redirect pages
- Fixed issue with incorrect row count in forms with hidden fields
- Fixed issue with empty rows in memberlists without username (#929)
- Fixed issue with event feeds containing foreign entries (#866)
- Fixed issue with certain multi-day events not being calculated correctly (#855)
- Fixed issue with empty keywords being added to the meta keywords tag (#540)
- Fixed issue with navigation icons not being disabled in the template editor (#761)
- Fixed issue with insert tag "user" not formatting its output (#957)
- Fixed issue with backlinks not being exempt from the search index (#896)
- Fixed issue with special characters in file names not being decoded properly (#877)
- Fixed issue with default user and group not being applied (#888)
- Fixed issue with missing "readonly" attribute of text field widgets (#901)
- Fixed issue with group login page overriding option "last page visited" (#916)
- Fixed issue with thumbnails of large images exceeding the memory limit (#922)
- Fixed issue with subscriptions being activated upon registration (#881)
- Fixed a few issues with the style sheet importer (#838)
- Fixed various spelling issues (#942)
- Fixed a few minor issues

(taca)