Description of proposed changes

• iono_split_spectrum:

  • hardwire dataset name to unwrapPhase while inverting for iono TS
  • remove the template file input, so it can ignore the template inputs, such as the unwrapPhase_bridging if one turns on the PU error correction.

• defaults.smallbaselineApp.cfg: update correct_ionosphere reference, to be consistent with iono_split_spectrum.py help message.

Reminders

• Fix ionospheric corrections in MintPy #1189 (comment)
• Pass Pre-commit check (green)
• Pass Codacy code review (green)
• Pass Circle CI test (green)
• Make sure that your code follows our style. Use the other functions/files as a basis.
• If modifying functionality, describe changes to function behavior and arguments in a comment below the function declaration.