2.1.17

Don't use this commit for production (see comment).
* encryption (bCrypt) of pw changed. OK for all passwords but re-encryption of existing Item passwords not finalized.
*298 - Protection against bad actions on personal folders
*299 - User can be explicetly administrated by Managers of specific Roles
*300 - Personal SK is encrypted in COOKIE
*301 - Corrected query call error