ErrorReporting: Don't send scheme filename when no schema
ErrorReporting: Don't send scheme filename when no schema

When schema is not sent `data[WIDGET_SCHEME]` was not empty but contained the scheme's filename. Remove `WIDGET_SCHEME` from data when scheme is not sent.

cheral/orange3,cheral/orange3,cheral/orange3,cheral/orange3,cheral/orange3,cheral/orange3