1. export in new catalog fixed
2. openSelector fixed, now it really uses given url as form.action during submit
3. added ability to specify onAfterOpenPopup callback for open_popup function
4. new unit config option: PassPriority, used to sort prefixes in "env" variable in links
5. new tag abstract tag ModifyUnitConfig, used as addition to OnAfterConfigRead, but is called only when combined_header is used
6. fixed problem, when events from GET were not passed, when empty event names were presetnt in POST
7. SelectParam helper method changed, now it can be used as tag: selects 1st parameter, that has value from given parameter names
8. category sorting by priority is only applied in admin (now it's not forced) and in CachedMenu tag
9. tag c_HomeCategory added to return home category, because not it's Content (id > 0), not 0, as before.
10. fixed "SaveWarning" tag for categories. now it is displayed during category editing.
11. Virtual fields shown in grid are now skipped from search, when they doesn't have corresponding calculated fields
12. Missing email events (found in language pack, but not found in db) are now skipped without rising sql error.
13. new parameters perm_prefix and perm_event added to combined_header block. They as used during permission checking.
14. new parameter pagination_prefix added to combined_header block. It's used (when passed) as prefix for drawing upper pagination bar (usually in subitem lists).
