add ability to toggle visibility of layers by menu and ctrl+
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spetm,
thepurlieu
lots of copy&paste again...
callback checks mainProject->last_loaded for index limits of mainProject->file[] and the rest is stolen from callbacks_layer_tree_visibility_button_toggled, which may be refactored together with this callback btw.
Great work...thanks Stefan. I modified the patch slightly to reduce the clutter in the View menu, but it looks great.
Cheers--