Fix add send date to admin and fix cronjob

Previous behaviour

Steps to reproduce:

1. No input

New behaviour

Steps to validate that it works:

1. There is input

changed milestone to %24

added bug label

marked as a Work In Progress

changed milestone to %25

added 1 commit

• 9b0b7340 - Set newsletter sent to True on management command

Compare with previous version

The following runtime error is generated by the command:

/usr/local/lib/python3.7/site-packages/django/db/models/fields/__init__.py:1363: RuntimeWarning: DateTimeField Event.end received a naive datetime (2019-06-17 00:00:00) while time zone support is active.
  RuntimeWarning)
/usr/local/lib/python3.7/site-packages/django/db/models/fields/__init__.py:1363: RuntimeWarning: DateTimeField Event.start received a naive datetime (2019-06-03 00:00:00) while time zone support is active.
  RuntimeWarning)

added 1 commit

• 0e02a836 - Fix timezone aware and add services code

Compare with previous version

changed milestone to %24

unmarked as a Work In Progress

added 17 commits

• a097832c - Merge branch 'fix/sendplannednewsletters' into 'master'
• 8f990c1c - Merge branch 'minimiseregistrations-runtimeerror' into 'master'
• cffed2c4 - Merge branch 'fix/events-pushnotifications' into 'master'
• a6d28c9b - Merge branch 'fix/event-cards-filter' into 'master'
• 2abbcb94 - Merge branch 'feature/events-notification-default-url' into 'master'
• d3dbf348 - Merge branch 'fix/birthday-registration-label' into 'master'
• dcaac796 - Merge branch 'uwsgi-exec' into 'master'
• 535ebb56 - Refactor documents views to class-based
• 426705bc - Fix thumbnailing of images to same size as source
• bb4dfb66 - Update dependency firebase-admin to ~2.17
• ca1ced12 - Set the current version (24) in pyproject.toml
• 4e2ef5ac - Add mailinglist documentation
• 6ce917fe - Add documentation to the partners app
• 32fda6eb - Add file documentation to mailinglists
• b7626f1a - Fix add send date to admin
• 2f31d7d2 - Set newsletter sent to True on management command
• 7a416e12 - Fix timezone aware and add services code

Compare with previous version

added 36 commits

• 7a416e12...3cd7b430 - 33 commits from branch master
• 38b9cb5b - Fix add send date to admin
• 2209a1ec - Set newsletter sent to True on management command
• 834fe1a5 - Fix timezone aware and add services code

Compare with previous version

added 1 commit

• 7a26ae19 - Fix timezone aware and add services code

Compare with previous version

added 1 commit

• 38baaca8 - Fix timezone aware and add services code

Compare with previous version

changed title from Fix add send date to admin to Fix add send date to admin and fix cronjob

changed the description

resolved all discussions

merged

mentioned in commit b33e9c0f

mentioned in commit 229fc1ed