Add mgain parameter
This MR adds an option for specifying WSClean's mgain parameter (see RAP-933) and adjusts the default value. The default value for normal imaging is now 0.8; for the initial model generation, it is kept at 0.85.
This MR adds an option for specifying WSClean's mgain parameter (see RAP-933) and adjusts the default value. The default value for normal imaging is now 0.8; for the initial model generation, it is kept at 0.85.