Can not edit calendar booking when user language and portal language are not same

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.0 CE GA1, 7.0.0 M3
• Fix Version/s: 6.2.X EE, 7.0.0 M1
• Component/s: Calendar
• Labels:
  • QA-NA
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 6
• Fix Priority: 5
• Git Pull Request: https://github.com/brianchandotcom/liferay-plugins/pull/3043

Steps to reproduce:
1) Set default portal language to non English language (e.g. Slovak
2) Set user's default language to English
3) Logged as given user, visit page with calendar portlet (in English)
3) Add Event, give title in non English language (because default portal language, it is pre-selected), save
4) Close the event window
5) Edit event again

Expected result:
Possible to edit event, none error is thrown, all the javascript controls are working.

Actual result:
It is possible just to change title and description of event, all the javascript controls are giving none response.
Fifefox console writes: TypeError: document._1_WAR_calendarportlet_fm._1_WAR_calendarportlet_title_en_US is undefined
After re-saving event, everything is working (til window is not closed again)