Updates to BDAP v2.4.19 (WIP)

[AmirAbrams]

• Fix getblocktemplate when running a fluid mint transaction
• Update maketoken RPC help example
• Add ability to ban BDAP accounts with fluid
• Add missing pointer cleanup for Fluid, BDAP, and DHT objects in init
• Use stealth address for account link wallet address
• Handle stealth address when sending link request and accept
• Fix createrawbdapaccount RPC after using stealth address
• Add ability to upgrade wallet with corresponding Ed25519 keys if an older version is detected
• Add ability to upgrade older wallet that is locked. Defer upgrade until unlocked
• During unlock, add confirmation popup to GUI that older locked wallet needs to be upgraded and rescan done. Misc cleanup.
• Fix issue where bdap_link_accept was not being seen by original requester
• Create BDAP fee schedule and functions
• Use fee functions in account and link RPC commands
• Fix reserve key pool, check std::set entries exist before erasing
• Add BDAP fee enforcement checking
• Remove unused BDAP functions and methods
• Remove dead Waffle.io links from main Readme file
• Remove link registration days from UI
• Change account update from add days to add months in UI
• Cleanup BDAP UI code formatting (extra line feeds and comments)
• Format money debug print output for Dynode reward amount
• Bump client version to 2.4.19