Release v5.2.0

• [change-log]
• [fix] [patch]
• [cleanup] removed welcome emails
• [patch][fix] Sales BOM should be renamed before rename_table_fields patch
• [cleanup] removed welcome emails
• Patch for default BOM
• Fixed deafault BOM problem
• Update sponsors.md
• [patch] rename roles
• [help] added new links to Learn
• [fix] Mozilla hack for images in table for print
• Reserved warehouse should not be validated on cancellation of sales order
• [perm] added stock, project user for company
• [fix] time log overlap condition, #SavedByATestCase
• [fix] pos default payment #3631
• [fix] overlap fix in time log #3647
• [fix] supplier invoice number fix
• [minor] move position in accounts settings
• [fixes] hours in time-log #3644, project buttons on condition, removed Guest permission in notification_control
• [fix] Add to Cart visibility, Customer's Price List in Shopping Cart and Address creation from Shopping Cart
• [rename] Material User > Stock User
• [fix] Item image urls can now have paranthesis
• [fix] create SMS Log