NSM: comment sync manager
NSM: rename FilesModel to FilesTreeModel
NSM: create FilesListModel
NSM GoogleDrive: emit accountRemoved signal before erase
NSM: add signals about adding/removing accounts
NSM: change design, comment almost all code, add runtime adding/removing accounts
NSM: add proxy model for sorting
NSM: add StorageItem
NSM GoogleDrive: use StorageItem instead of QStandardItem* and add mime types
NSM: show files, icons
NSM: show trash
NSM: fix trash item ID
NSM: add multi drag&drop to tree view
NSM: update interfaces
NSM: copy, move, trash, untrash items
NSM: GetTrashedItems method
NSM: update interface
NSM: add context menu
NSM: fix restoring items my drag&drop
NSM: add url to StorageItem