When transforming, both `TransConvertType_EditArmature` /
`TransConvertType_Pose` get disabled from proportional editing
(`TransInfo` gets flagged `CTX_NO_PET` in `init_proportional_edit`).
This is intentional.
UI checks the mode and showing proportional editing properties was
already skipped for 'POSE' mode, but armatures in 'EDIT' mode would
still show them.
To resolve, also skip the UI for armatures in 'EDIT' mode .