Merge branch 'master' into PG_BranchV3
extension to deleting to modules and foldersWitSes

when deleting modules -> deletes its sessions -> deletes its audios and
images in each of those particular sessions.

when deleting folders with sessions -> delete its sessions -> deletes
its audios and images in each of those particular sessions.
Merge branch 'PG_BranchV3' of https://github.com/COC155MobileAppDev/MobAppDev into PG_BranchV3
Merge branch 'PG_BranchV3' into JE_BranchV3
DataManager, SelectedModule, and NewSession

All started