Bug: Symmetrize only works on active bone

[cgdive-todor]

Describe the bug

Even if you have multiple bones with applied widgets selected, the symmetrize function only affects the active bones.

To Reproduce

1. apply widgets to multiple bones on the left side
2. select them all
3. use the symmetry function :)

Expected behavior

It would be nice if it worked on all selected bones.

Operating System

Windows 10

Blender Version

Blender 4.1 (latest), Blender 4.0

Addon Version

1.2.1

Screenshots and additional context

No response