Agenda widget working in FireFox now, memory leak discovered and fixed.
Adjustments made in highcharts lib moved to javascript code now.
Shows only 4 mantis versions now.
Removed console logging.
News item headline is using a smaller font if it's too long.
JsDoc added.
Switched positions of categories in graph.
Bug in Mantis Stats chart drawing fixed.
Commented part out that caused the warning at start-up.
Fixed the set font size function for news headlines.
CSS file is valid now.
Removing / adding messages is working better now.
Interval of switching updated.
Removed console logging.
Posting a message; showing it on a different screen without refreshing works now.
Start made with the Comic Widget. Small CSS bug fixed in piWidget.
Start made with Comic back-end.