Add View: reduce repeating interface for adding widget

[karmatosed]

Is your feature request related to a problem? Please describe.
There is a lot of visual complexity when creating a view for the first time. The interface has a number of repeating things could be reduced to ease this and allow clearer paths. One of those in particular is the 'Add Widget' action link.

By reducing density of repeating copy, it's going to aid seeing paths and how to do things within the interface.

Describe the solution you'd like
The editor has a simpler 'add block' interaction which is used on placeholders.

This could be brought in using either a full implementation or variations on hover, interaction.

Decisions would need to happen whether to show 'all' active fields at the same time. My recommendation would be to consider a lighter approach here perhaps highlighting to one(s) most likely. Another approach could be to activate the first and disable the others, but that could result in bias of placing.

This is what the group block does in editor:

Implemented that could look like this:

Describe alternatives you've considered
A simpler version could be to just remove the text, but this doesn't give the benefit of the placeholder or understanding of 'adding' that is within editor now.

[karmatosed]

Closing to move to the iterations board.