Session Details: External web links icons are confusing

[Smoochibi]

In the Session Details, at the end of the Speaker Info block, there are a bunch of links related to the speaker.

There are 2 potential issues:

• The user does not know where the links point to.
• The planet icon that is used could look like a placeholder icon to some users (eg the correct icon did not load)

[BoD]

Hey I'll have a look!

[martinbonnin]

Closed with #162