Impossible to create an event by selecting the period in the calendar view anymore on XWiki 13.2

[tmortagne]

Environment: XWiki 13.2/13.3, Firefox/Chrome
Calendar application version : 2.9.3

To reproduce:

• install Calendar Application on XWiki jetty+hsqldb 13.2 end ask for a trial
• go to http://127.0.0.1:8080/xwiki/bin/view/MoccaCalendar/
• click one of the days in the calendar view

-> the day is selected but you don't get any popup to actually create the event anymore

There is a lot of errors in the console, but they all seem related to the date picker so more #59 I guess.

I don't have the problem on XWiki 12.10.6.