Issue by tocab, grimreaper, maboy: Replace Core offcanvas by Bootstrap's one +...

Issue by tocab, grimreaper, maboy: Replace Core offcanvas by Bootstrap's one + fix modal buttons not updated + fix offcanvas does not close after form submission

Closes #3476384

mentioned in merge request !206 (closed)

removed this merge request from the merge train

added 2 commits

• f5ef38b2 - Issue #3476384 by tocab, grimreaper, maboy: Replace Core offcanvas by...
• b6a2bc78 - Issue #3476384 by grimreaper, pdureau: remove Core offcanvas styling to fully...

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merged