Extend user_message feature so that a "severity" information can be passed alongside the messageThis allows theme templates to color code messages according to their severity. Severity follows the Bootstrap nomenclature of "info", "success", "warning" and "danger".Default severity has been set to "success" consistent with styling applied so far by OpenACS to the user messages.
Introduce a new "label_headers" flag for template::list::write_csv that allows to revert to behavior before https://cvs.openacs.org/changelog/OpenACS?cs=MAIN%3Adaveb%3A20080908165252, e.g. use the column names as headers rather than the labelsFor some use cases is in fact more useful to have machine-readable headers, e.g. when processing the csv via software