[DialogHelper] Multiselect : added an option to the "select" function that makes the possibility of multiselect options.
merged branch quiqueporta/multiselect (PR #7602)

This PR was squashed before being merged into the master branch (closes #7602).

Discussion
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[DialogHelper] Multiselect : added an option to the "select" function that makes the possibility of multiselect options.

When the option list appears, you can select more than one value separated by comma.

 Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
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c8a5e02 [DialogHelper] Multiselect : added an option to the "select" function that makes the possibility of multiselect options.
[Console] updated CHANGELOG and added some more unit tests