User feedback of brand new Pyrog

[elsiehoffet-94]

Essential Feedback

• pre-fill join tables when the SQL input table, or filter table differs from the reference table.
• the orange dots (= filled attributes) stay filled after deleting attributes

Nice to have

• move 'remove input button' (X) above the SQL input or condition, to avoid component overlapping
• when selecting an attribute, the first click 'add an input group' is superfluous. We can discuss how we can avoid this

Very nice to have

• undo : revert a click that removed the condition
• suggest sql input based on last sql input