Make first 2 columns in merging dialog sticky

[maxpatiiuk]

Currently, the first column (the field label) in each row is sticky - when you do horizontal scrolling, the column remains on the screen

Making the 2nd column sticky would be great too (the merged record preview)

Not possible without a subgrid as far as I am aware. Subgrid support is still quite low.

Screen.Recording.2023-01-18.at.13.45.30.mov