thanks to MrMormon
in Pd-l2ork commit 67e02827e599004f064ee7a1f54fa13d0faf9cfc

refactor dialog_canvas.html to use javascript objects instead of ["name1", "value1", "name2", "value2", etc.] arrays

change fielddesc_getfloat to fielddesc_getcoord so that the (admittedly arcane) scaling/quanta syntax can be used with [draw] methods where it makes sense

do a proper loadbang for canvas fields (needs more testing)

(differs slightly from mine in that the '-' character is used to mean
 a wildcard template)

from pd-l2ork: 1e654625d71b6c0efae614cfa428e8cfae6e9b1e

from pd-l2ork: 640d3c53ad8cd592b1d757b988e27d3ada2b1779

from pd-l2ork: 9e88d7ac62c7c4a2717efe7953ac2165e1c5b816

(this should change modes correctly and address all the failed hunks in the previous porting attempt)