improve prosemirror behaviour

avoid duplication on drag
use pointer cursor

honor configured mode in prosemirror menu

add icons in menu

make everything work :-D

Prosemirror: don't submit the form on button presses

prosemirror: fix embedded saving

The node type wasn't saved back correctly from the form.

prosemirror cleanup and singleton form

Some initial cleanup of the form class. It's now a singleton.

Handle titles and dimensions in prosemirror

proper differentiation between mediafile and embed in prosemirror

initial work on making embedded diagrams work in prosemirror

Fix indentation

refresh diagrams in prosemirror after editing

remove unnecessary resolveImageAttributes

No need for an Ajax roundtrip

simplify node view

Use img to render, remove wrapper

Add edit button in Prosemirror

Select files in media manager in Prosemirror

Simple Prosemirror menu button and edit form

Attach Prosemirror schema when API is initialized

Rudimentary prosemirror support (as yet only view)

fix handling of non-diagram SVGs

do not treat all SVGs as diagrams in mediafile mode

Remove the SVG Sanitizer again in favor of CSP headers

This introduces a renderer that allows us to call each embedded SVG as a
separate URL with added CSP headers. This way we rely on the same safe

Remove the SVG Sanitizer again in favor of CSP headers

This introduces a renderer that allows us to call each embedded SVG as a
separate URL with added CSP headers. This way we rely on the same safety
feature as with media file based diagrams.

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Fix too greedy regex

Otherwise multiple diagrams on the same page match

style fixes

fix media manager integration with deferjs disabled