[favorites view] Allow user to organize their panels by drag and dropping them

[grafakus]

Feature description

Is your feature request related to a problem? Please describe.

The favorited vizualisations are sorted alphabetically. When their number grows, it can be convenient for the user to arrange them as they prefer.

Describe the solution you'd like

Make the panels draggable and resizable, like in a dashboard, so that the user can group them and organize them as they prefer.

Alternatives considered

Describe alternatives you've considered

We could also offer the possibility to create groups or tabs.

Additional context

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