* added forgotten mapper strings for esES, ruRU, frFR
* readded default name for screenshots and videos tab
* fixed referencing not set $id in opensearch (wich now displays icons once again)
* fixed referencing a long removed variable in admin=screenshots, preventing delete operations
* moved wt_presets to DB
* scales are now saved sensibly instead of just being dumped as is (also, tables have now constrains)
* added admin=weight-presets to edit presets
* added an internal user on id:0 who 'owns' the wt-presets and the +1 rates on new comments
* consequently added constraints to comment-related tables
Misc:
* Util::toJSON() priorizes its flags over CFG_DEBUG, wich fixes the modelviewer-redButton
* moved terrible javascript-dump from admin-page to template
* separated into appropriate subclasses
* unified sanitizing of $_GET and $_POST data using build in filter_input()
* index now always tries to resolve page calls with ajaxHandler first and as a page last
minor bug-fixes to bugs that wre not reported yet, because they didn't occur yet
(e.g.: nobody tried to compose a comment with >7500 characters yet)
