[Grida Canvas] clipboard decode on windows fails with `<!--StartFragment-->`

[softmarshmallow]

(I don't own a PC)

on Windows machine, writing text/html payload adds dirty fragments link.

The <!--StartFragment--> and <!--EndFragment--> are messing up with the xml tree, causing failure of parse. to cater this, either

• add a pre-defined query map
• make query attribute based, not path based.