Fix margins in select widget and not in parent widget where it is used
Add setting of master password, for unit tests and automation
Update master password debug/feedback output; add feedback to app/stdout
Always clear master password from credentials dialog text field
Start authentication utility functions
Finish authentication utility functions, except reset master password
Fix basic auth config validation issue
Add check if a single master password hash exists in database
Add master password reset (unfinished)
Add master pass reset (untested); move auth utilities to new gui class

- Need to add utilities menu to auth editor dialog
Add master password reset, clear cached configs; refactor some names

- Default to cancel button on destructive operations
- Add verification that master password can decrypt existing configs
Update master password input dialog, relative to whether password is set
Add utilities to authentication configuration editor

- Fix excessive signals emitted by password validation during reset
Add DER format support for PKI components
Cleanup alignment of auth config select widget's fields
Merge branch 'master-2_6_0-auth' into master-2_6_0-auth-boundless