[Feature request] Automatic locking of tile's children in place

[ghost]

When tiles are sandwiched (or in any other case, really) you usually move them around. Automatically applying flag that would forbid accidentally moving tile's children would be very handy (it should be somewhere in editorplugin class, I think).

[puppetmaster-]

this gdscript will lock the nodes

set_meta("_edit_lock_",true)