refactor: clean up code to py39+ supported syntax
- f-strings instead of format
- latest typing support instead of pre 3.9 TitleCase
- remove UTF-8 declarations.
- many more changes
Powered by https://github.com/asottile/pyupgrade/ + manual cleanups
* feat: backup-encryption
* fix: Using encryption key and Minor changes.
* fix: Sider.
* fix: Closing curly brace does not appear on the same line as the subsequent block.
* fix: Review Suggestions.
* fix: Minor changes.
* chore: Icon
* fix: Icon and Privileges Changes.
* Remove six for PY2 compatability since our dependencies are not, PY2
is legacy.
* Removed usages of utils from future/past libraries since they are
deprecated. This includes 'from __future__ ...' and 'from past...'
statements.
* Removed compatibility imports for PY2, switched from six imports to
standard library imports.
* Removed utils code blocks that handle operations depending on PY2/3
versions.
* Removed 'from __future__ ...' lines from templates/code generators
* Used PY3 syntaxes in place of PY2 compatible blocks. eg: metaclass
* New message email
* Mentioned in a comment
* File backup email
* Feedback email
* Administrator logged in email
* Upcoming events email
* minor
* Add header title and indicator color
* Replace a typeof test against undefined with comparison against a string
* Add rel='noopener noreferrer' attributes to target='_blank' links
* Remove a duplicate object property definition
* Remove superfluous argument to function call
* Remove some variable declarations for which the assigned value is never read
* Remove an assignment to a variable that is never read
* [Minor] Allow user to set limit for downloadable backups for the site
* [Fix] Updated path for daily_long and weekly_long dropbox backup hooks
* [Fix] Updated system_settings.json
