Tootlips for table visualization

**Describe the solution you'd like**
In a table visualisation of communications, show the communication content in a popup/tooltip when hovering on the subject. All these data are available in the question.

In other words, on a table visualisation, be able to set an available "stringable" field as a tooltip to show when hovering the data. Could be set in the same place than column title and view as Text/Link, with a "related" field selector which, when set, would tell to show the content of this related field as a tooltip for this data.

**Describe alternatives you've considered**
Add this feature from navigator content script plugin.

**How important is this feature to you?**
Great to have !

Start by locating the table visualization and its column configuration, then trace how fields are selected for display. Define how a related string field would be selected and shown on hover, and verify that the communication content appears as a tooltip without changing the existing table display.

Written by the indexing model from the issue text.