Changes

Portions of OSCAR are © 2019-2020 by ''The OSCAR Team''

* [fix] Support migration from both SleepyHead and OSCAR.* [fix] Correct 95th percentile computations on Statistics page when some days were summary-only.* [fix] Improve some prompts and tooltip messages.* [fix] Improve support of rare Philips Respironics 950P events and update warnings.* [fix] Empty directories in Profiles directory are not shown in Profiles list.* [fix] Show correct copyright when installing Debian version.* [fix] Improvements to Chromebook identification.