Test 1 - foreignObject content change in grid:
  SVG width unchanged: true
  SVG height unchanged: true
  Sibling width unchanged: true
Test 2 - SVG root width attribute change in grid:
  SVG width changed to 150: true
  Sibling width decreased: true
Test 3 - abspos inside foreignObject in grid:
  SVG width unchanged: true
  SVG height unchanged: true
  Sibling width unchanged: true