eolian_mono : add verb unselect on naming helper.
currently select is verb and mono name is exposed SelectAll
but unselect is non-verb and mono name is exposed AllUnselect.
to fix this differencies, add unselect in the verb list.
Reviewers: segfaultxavi, Jaehyun_Cho
Reviewed By: Jaehyun_Cho
Differential Revision: https://phab.enlightenment.org/D10952