issue #196 Check the custom CSS/JS input fields for insecure content loading

modified messages

revalidating on submit and displaying extra message before saving and in secure links

style and writing modifications

combining display messages method

box-alert change
(cherry picked from commit dcf58e7957f60168e4c7f19bf8643cd66a435e35)
Merge pull request #203 from rmostafa/crowdhoster_issue_196

issue #196 Check the custom CSS/JS input fields for insecure content loa...