Fix FF when switching to new admin
Merge branch 'master' of https://github.com/ajaxplorer/ajaxplorer-core
Fix various hitches on QRCode impl.
Normalize style for sharing actions
New variable AJXP_SANITIZE_FILENAME, to be less restrictive on the allowed characters than AJXP_SANITIZE_HTML_STRICT. Particularly, allow commas in filename.