[Emily, Remo][unicef_ejrf/#406] Sequencing subsections in a section: Added subsection reorder service.
[Remo, Emily] [unicef_ejrf/#406] Sequencing subsections in a section: adding view to call reorder service plus tests.
[Remo, Emily] [unicef_ejrf/#406] Sequencing subsections in a section: displayin subsection names within a specific section into a modal.