Fixed 404 headers. REF: #1620
Fixed display of option choices when editing an option that does not use choices.
Removed redundant code from admin footer controller
Fixed hyphen problem with PayPal Express checkout url
* Changed PayPal cardissue to issuenumber variabe for PayPal Pro

REF: 1822
Used correct admin setting to check if product count should be done on a category

Close: #1828
Change log updated to include the fix for the exception error during a failed mysqli connect problem.