Complete check for mass position channels

closes #298

• Add ABC to mass position options in GUI
• Add ABC to check chan
• Separate in to group 123, ENZ, ABC; 456, UVW to give warning if there's some channels in a group not exist.
  • If none of 123, ENZ, ABC detected it will be counted as 123
  • If none of 456, UVW detected it will be counted as 456