use original two greys for syntax for transform source

[disconcision]

search 663832872 in layout for wip.

it looks good in the tests.

maybe also make this a special capture, distinct for the tab-based ones.

one plan: for menus with non-hole source, make first item the capture of the source. first transform is source -> source-capture. is source 'actually captured' (for matches)? also populate source-capture -> source transformation. so pressing enter enter would be the same as tab (a 'half' capture?) (enter enter again uncaptures)

[disconcision]

implemented. looks... okay. not defaulted.

at least make capture-on-transform into an option