This implements #140

This is necessary since django-bootstrap4 expects a bootstrap javascript version that already includes popper
Bump jquery to 3.5.1
Bump bootstrap to 4.6.0
Remove separate popper lib
Adjust paths in settings. This also makes sure that the local jquery version is always used, which was previously not the case for admin views that depended on code.jquery.com
Remove explicit popper loading that was introduced in 2c359090 to mitigate the effects of the update in c0b3478c

Make sure popper frontend dependency is always loaded before bootstrap script files load
This fixes #121 as well as issues in admin interface (scheduling and track management)
Make track management javascript more robust (this resolves an issue occurring when moving an AK with track back to list of AKs without tracks)

Benjamin Hättasch authored 4 years ago and Nadja Geisler committed 4 years ago

Introduce writable API for events (protected)
Implement change callback function in javascript
Use full version of jquery in admin backend (to make ajax functionality available)

Ask user if they really want to change the language as it will clear the form as soon as the main form on the page was edited at least once.
Fixes #80

This is the base for custom admin views (with admin design and permission checking)
Replace default admin site with custom admin site in AKModel
Use custom admin index template & apply first basic change
Introduce custom admin base template (including bootstrap loading)
Introduce Mixin for AdminViews

Add choosen-js library and assets for nicer looking multiple select
Add new blocks for loading of individual assets to base template
Use choosen-js for multiple fields in AK submission view

Adapt settings
Add i18n urls to central url conf
Add language chooser to base.html
Adapt readme and utils

Add dynamic title handling to base html
Add more information to submission overview
Move AK list to own file for use in other pages
Add detail view for AK
Add views with AK overview list as well as filtered lists (by type and tag)
Add corresponding German translations

Create base.html
Add common template folder to settings