transifex-client adds trailing newline that pre-commit hook fixes

Merge pull request #1051 from snoop2head/master

update installation docs' login redirection's django.urls for django 2.2+

switch order database config <-> template config in docs/installation.rst

Merge pull request #1049 from benjaoming/bootstrap4-deprecations

Manifest.in warnings: Replace less with with sources and don't describe non-existent items