Implement Data Overview Sidebar

[alexsb]

We need a consistent side-bar that can be used in the main client interface but also in the views. Ideally, this should be a standalone package, as we need this in many projects.

Taggle has a nice one, but there is some specific stuff in there - https://taggle.caleydoapp.org/#aids
We have one in the views, but it's missing some features and isn't available in the main interface.

There is also some overlap with the importer interface.

This view should be able for each table to do the following things:

• shows the data type and change the data type
• shows distributions and number of items (if the data type allows it)
• data column selection (which column should be shown were), possibly via drag and drop and a drop-down
• can be used to filter items using a brush (for numerical data) or selecting categories for nominal/ordinal data
• can be used to specify data transformations (log, clipping)

[waxlamp]

The selection operators especially can be part of the eventual "query builder" interface we have been thinking about.

We will need to think hard about what operations this sidebar will enable, and what the semantics for those operations would be in different places (i.e., main client vs. vis apps).

This will be a powerful addition to the project.

[waxlamp]

The idea that this should be a general component that can be redeployed in different applications makes me think this also has a connection to the multiple coordinated views infrastructure that we are beginning to think about now.