Added a section about using named assets
feature #3496 Added a section about using named assets (vmattila)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #3496).

Discussion
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Added a section about using named assets

This PR will add a section about named assets to the asset management page.

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
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9c9743e Added a section about using named assets