Description of problem:
There are several use cases when it is required to apply some bulk action to [all|pending] tasks in foreman. E.g. to resume or cancel them.

Currently, no such "one click button" exists and one has to resume or cancel all such tasks one by one.

It is requested to have a bulk action to apply given action on all selected tasks (i.e. on all tasks that a filter found).

Version-Release number of selected component (if applicable):
foreman-1.6.0.53-1

How reproducible:
100%

Steps to Reproduce:
1. Try to apply an action to all/selected tasks in one bulk.

Actual results:
No way doing so.

Expected results:
Have ability of doing so.

Additional info: