Merge pull request #25 from hugo187/master

multiplicator price fix
remove serif font family definition for blockquote
disable CodeMirror for HTML node edit
use dialog for product add
split full path detection for nodes and taxonomy in tree menu
Merge branch 'master' of github.com:laposa/onxshop
mark Onxshop 1.6.0
make sure add button is visible when news list is empty in backoffice
remove discount from PayPal form as this is already included in the amount_1