[FEAT] Mosviz: Implement Mosviz compatibility fixes for Unit Conversion plugin

[rosteen]

Description

We are disabling the Unit Conversion plugin in Mosviz until we come up with solutions for the following points:

• What happens to the x-axis syncing between the 1D and 2D spectra when unit conversion is applied? Right now they just desync and the 2D spectrum gets squished/otherwise messed up. We should probably convert the 2D x-axis at the same time.
• What happens when you click another row and then back to the row you converted? Right now it goes back to the original units, and there's not really a way to get the converted spectrum back (we don't want users going into the Data menu, really).
• Should there be an option to convert all of the spectra when you do a unit conversion, and then have those displayed when you click through the rows?

[pllim]

Also need to add back the removed section (#889) when this is worked on.