1) Upgraded passlib==1.7.1 to passlib==1.7.2
2) Replace unmaintained Flask-Security with maintained Flask-Security-Too package, which is also compatible with python 3.8
3) Other compatibility code changes.
- Process watcher made fixed width with header changes, time details rounded to 2 decimals
- Query history will show "No query history" if no query fired. Query editor default size increased.
- Fixed a bug where New folder create button not working when in List mode and No files/folder present.
- Other minor improvements.
2. Ensure backup should work with '--data-only' and '--schema-only' for any format. Fixes#3347
3. Added supported "Dump Options" for "pg_dumpall" which was not there since pgAdmin 3.
4. Fixed issue where "--clean" should not clubbed with "--data-only" while taking backup.
5. Fixed "--oids" should not clubbed with "--inserts" or "--column-inserts" while taking backup.
