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fix [#27778] Set Bone Flags - No Scale - Toggle seems not to work.

Toggling options on the selection is better done as a generic operator.
Replace ARMATURE_OT_flags_set and POSE_OT_flags_set with WM_OT_context_collection_boolean_set and use menus to access it with specific settings.

This way its easy make a key shortcut which toggles any boolean on any collection - sequences, metaballs, objects, bones etc.