Bug 1657559 - Make collapsible indicator in retractable block clickable

Removed inner-link class from the template because it is unnecessary, inner-link class has higher z-index which make it sit on top of the link that toggles the collapsible.

behatnotneeded - styling only

Change-Id: Icc9035515c03ede436a072f43057161581c80321
(cherry picked from commit 55e672dd)