The National Association of Realtors has agreed on Friday to pay $418 million and change its rules to settle lawsuits claiming homeowners have been unfairly forced to pay artificially inflated agent commissions when they sold their home. — AP Photo/Matt Rourke, FileA powerful real estate trade association has agreed to pay $418 million and change its rules to settle lawsuits claiming homeowners have been unfairly forced to pay artificially inflated agent commissions when they sold their home.The National Association …