The CKEditor API & guide specify that contentsCss can be either a string or an array (overloaded APIs are bad :/), but placeholder_select's initialisation script assumes it is always a single string. Thus when richCombo reads panel.css it coerces the first value to a string, which ends results in a link whose href is a comma-separated list of all user-set stylesheet URIs.
The CKEditor API & guide specify that
contentsCsscan be either a string or an array (overloaded APIs are bad :/), but placeholder_select's initialisation script assumes it is always a single string. Thus when richCombo readspanel.cssit coerces the first value to a string, which ends results in a link whosehrefis a comma-separated list of all user-set stylesheet URIs.