PowerFolder 26.1 and 27.0: login history and sub-folder sharing

Version 26.1 shows your recent logins in the web interface, redesigns the device overview and lets you create WebDAV tokens under My Account / Devices; shared folders of expired accounts can be locked automatically. In parallel, version 27.0 introduces sharing of individual sub-folders as a beta feature — a shared sub-folder appears at the recipient as a top-level folder — and splits the folder list into My Folders and Shared Folders. For production use the release notes for 27.0 still recommend version 26.x.