Observable type boxes doesn't line break on alert preview pane

[mats-ch]

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	RHEL7
OS version (client)	RHEL7
TheHive version / git hash	3.0.9
Package Type	RPM
Browser type & version	Chrome 66.0

Problem Description

Alert preview pane:
Observable boxes doesn't float, so if you've got more than your display can present on one line you won't see all of them.

Steps to Reproduce

1. Create an alert with lots of observable types (more than 15 on a 1920px wide display).
2. Open the alert preview pane.

Possible Solutions

Add a float: left css entry for span on
the oberservable type div class.

Complementary information

[saadkadhi]

Possible Solutions

Collapse after a certain number of observable types and give the ability to expand as a list.