Merging "st" and "c" prefixes. Theme selector.

1. Theme selector for catalog/advanced_view
2. Catalog is now derived from "Content" category as Proj-CMS
3. Search box for category permission editor
4. yellow/red folder (small/super small) icons moved to core (from proj-cms)
5. getFrame hang up fix in all getFrame copies
6. Fixed 2 popups from System Tools section
7. added QuickCategoryPermissionRebuild configuration variable
8. missing OnResetSorting event permission mapping added
9. kDBBase::PrepareFieldOptions is now called only once per field
10. usage of undefined configuration variable "UseFileCache" in "cache.php"
11. cache variable cms_menu is now deleted together with StructureTree (in adm:OnResetCMSMenuCache event)
12. Fixed spelling error on $add_collation variable in kPermCacheUpdater::initData method (bug by Dima)
13. "menu" type added for category lists (<inp2:c_InitList types="menu" except="menu"/>) for showing/excluding menu items from category lists
14. During theme file rebuild files from disabled theme are not added to ThemeFiles table
15. Templates with .des.tpl and .elm.tpl extensions are skipped on structure creation step; also ".svn" directory is skipped
16. New parameter "additional_blue_bar_render_as" for block "combined_header" allows to specify block to render at right corner of blue bar.