Display origin motions in motion

[bastianjoel]

resolves #3529

• Categories and motion blocks loaded as meta data for the origin meeting are shown in the current meeting.
• missing line numbering feature (currently reactive to line numbering from motion in meeting)
• all polls are shown in the tab view
• the "versions" are not selectable (diff, original, changed, final)
• One can create a change recommandation in the orgin motion
• The user of the forwarded motion is wrong
• Tabs should be ordered
• Missing fields
  • additional submitter
  • additional state
  • recommendation + extension
  • Referring motions (might be impossible)
• Display amendment submitter in diff mode if "show amendments" enabled
• display icon in diff mode if amendment has change recommendations
• remove tree dot menu from amendment in origin view

[bastianjoel]

Talked with @emanuelschuetze that for origin the diff mode is sufficient and a selection is not necessary.

[bastianjoel]

Line numbering is now using the default line numbering mode from origin meeting.

[bastianjoel]

The user of the forwarded motion is wrong

@rrenkert This is not part of #3529 if I understand correctly