Import should keep first valid VALARM

Steps to reproduce:

• Import a iCal file containing a VEVENT with VALARM components like below
• Launch import

Actual behaviour:

• No reminder is associated to the imported event

Expected behaviour:

• Any usable alarm (the 2nd one in this case) is used as reminder

Example VALARM

BEGIN:VALARM
X-WR-ALARMUID:84029F41-B383-4F8F-82D6-32081C3F8E34
UID:84029F41-B383-4F8F-82D6-32081C3F8E34
TRIGGER;VALUE=DATE-TIME:19760401T005545Z
ACTION:NONE
END:VALARM
BEGIN:VALARM
X-WR-ALARMUID:DCF04837-9E81-4EA8-A94E-3398CBE88070
UID:DCF04837-9E81-4EA8-A94E-3398CBE88070
TRIGGER:-PT1H
ATTACH;VALUE=URI:Basso
ACTION:AUDIO
END:VALARM