Ignore subflow debug nodes when building filter Fixes #1660
Ignore subflow debug nodes when building filter
Fixes #1660

As the editor doesn't know the ids of subflow instance debug nodes
there's no easy way to build a list of them as part of the filter
options. So for now, disable the filter option if we don't know
about the debug node.

Kazuki-Nakanishi/node-red,node-red/node-red,namgk/node-red,Kazuki-Nakanishi/node-red,node-red/node-red,mw75/node-red,HiroyasuNishiyama/node-red,btsimonh/node-red,btsimonh/node-red,mw75/node-red,HiroyasuNishiyama/node-red,btsimonh/node-red,Kazuki-Nakanishi/node-red,Kazuki-Nakanishi/node-red,node-red/node-red,mw75/node-red,mw75/node-red,HiroyasuNishiyama/node-red,namgk/node-red