Have the ability to remove several problems at the same time

**What it's the actual situation on ARA ?**
Currently on ARA, the multiple removals of problems doesn't work, it must therefore be done one by one what can be time-consuming as a task.

**Describe the solution you'd like**
What I would like, would be to have the possibility to select several problems at the same time and thus proceed to the deletion in one shot.

The issue names no files, tests, or entry points. Start by tracing ARA's current problem-removal flow and identify where problem selection and deletion are handled; the work is done when several problems can be selected and removed in one action.

Written by the indexing model from the issue text.