Make the mind mapping tool work like a CONCEPT mapping tool:
When dragging a photo / embed feature closer to a mind map node, automatically assign said photo / embed as a child node / sister node. Then, using TAB, continue the mind map from that photo / embed.
When dragging the mind map, photos / embedded items integrated into the mind map will automatically be dragged together, as they BELONG to the mind map itself.
Also, please make 2+ parent nodes generate single child node -→ CONCEPT MAP feature.