fix: wysiwyg editor initialization; fix: validator-remote logic

1. TinyMCE doesn't like @ in page URLs, so a special workaround is required for it to function on pages with @ in URL
2. validator-remote doesn't respect 'required' validator as other validators do, i.e. it triggers for empty fields as well, the  fix make it work as other validators do, i.e. only trigger if there are some data in the field (actually, it worked fine in anahita 2.2, i take missing lines from there and put them back in place)

I regenerated minified versions (site.js & tiny_mce.js), though i would suggest you regenerate them with tools you trust (i used online tool i found via google). If you can recommend a trustworthy online minification tool, i'll use it for future.