GPv3: Cyclical set operator

Simply sets the cyclical property selected strokes. Note this does not add extra geometry like the legacy operator.

Note: also adds a key bind 'alt c' to toggle, same as for curves.

Resolves #113671

Pull Request: https://projects.blender.org/blender/blender/pulls/111904

scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -4610,6 +4610,9 @@ def km_grease_pencil_edit(params):
          {"properties": [("type", "ALL_FRAMES")]}),
         # Keyframe Menu
         op_menu("VIEW3D_MT_edit_greasepencil_animation", {"type": 'I', "value": 'PRESS'}),
+        # Cyclical set
+        ("grease_pencil.cyclical_set", {"type": 'F', "value": 'PRESS'}, {"properties": [("type", "CLOSE")]}),
+        ("grease_pencil.cyclical_set", {"type": 'C', "value": 'PRESS', "alt": True}, {"properties": [("type", "TOGGLE")]}),
     ])
 
     return keymap

scripts/startup/bl_ui/space_view3d.py

@@ -5814,6 +5814,10 @@ class VIEW3D_MT_edit_greasepencil_stroke(Menu):
         layout.operator("grease_pencil.stroke_smooth")
         layout.operator("grease_pencil.stroke_simplify")
 
+        layout.separator()
+        
+        layout.operator_enum("grease_pencil.cyclical_set", "type")
+
 
 class VIEW3D_MT_edit_curves(Menu):
     bl_label = "Curves"