Debate: argument improvements

[Andrei0872]

• preview argument
  Idea: you could select a range of text and export the serialized version of it. That part should be saved in a separated column(e.g. contentPreview) in the argument table.
• expand arg content with transition
• allow expanding multiple args at the same time
• show spinner while fetching the arg

{
  (p.argumentId === crtReadArgumentId && !isReadArgumentLoading) || (p.argumentId !== crtReadArgumentId) ? (
    <DebateArgumentCard
      additionalActions={renderAdditionalActions(p)}
      isExpanded={p.argumentId === crtReadArgumentId}
      readArgument={onReadArgument}
      debateArgumentData={p}
    />
  ) : <p>Loading...</p>
}

• setting setCrtReadArgumentId(argId); before fetching