Fix:  Left panel return button gone
Fix:  Left panel return button gone

After Webix 3.0.1 update, button "toF&G" for returning to the
upload/file controls disappeared but it's row was still taking up blank
space in the panel.

Cause: '&' symbol does not work as part of a button's ID.
Fix: changed id from "toF&G" to "toFG"

csera/Hydra,csera/Hydra