DisableCatalogSearch, RenderX_UA_CompatibleForIE config variables

#291 fix suggested (RenderX_UA_CompatibleForIE config variable)
#287 fix suggested (DisableCatalogSearch config variable)
fixed bug in ConfProperty

+ added values to TemplateSite.MVC\Web.config
Merge pull request #299 from NaseUkolyCZ/master

Issues #291 and #287 fixes suggested