General form improvements

[ohltyler]

Description

This PR improves the form inputs in 2 places:

1. Hides the multi-prediction feature unless the user explicitly wants to. In general, a single prediction configuration in the ML processors are sufficient.
2. Changes the preset query selector from a super select, to a popover button. This is so we don't persist state after users begin editing/updating the query. For example, a user could select "semantic search" preset, edit it, and before, the dropdown would still show "semantic search", even if the query had been changed entirely to something else. The new flow is a stateless button to select from a starting preset, and nothing more

More details:

• adds states in MapArrayField to dynamically render based on if there is 0 maps, a single map, a single map with no entries, and multiple maps. For example, we show the same view if there is no maps, or a single map with no entries.
• minor word updates and removing the extra helper text to try to simplify the amount of information viewed at once
• moves some button components into the preferred compact/small versions
• changing the query selector from a super select to a context menu and popover

Demo video, showing the simplified view when editing ML processor input map / output maps, and the new preset query selector:

screen-capture.2.webm

Issues Resolved

Makes progress on #23

Check List

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