fix: Avoid layout jump with rich workspace

[juliushaertl]

Alternative approach to #4254 which uses additional dav properties to already know on initial rendering if space for the rich workspace should be preserved.

In addition we can actually use the webdav markdown response to even show the full file content rendered before the text session is even started. As a follow up we could think about only initializing the session if the user clicks the rich workspace which would save us from lots of requests and problems with rich workspace always being locked.

[cypress]

3 failed and 2 flaky tests on run #12070 ↗︎

3

137

18

0

2

Details:

fix: Avoid layout jump with rich workspace
Project: Text	Commit: ce0efd6f00
Status: Failed	Duration: 05:13 💡
Started: Sep 8, 2023 8:46 PM	Ended: Sep 8, 2023 8:51 PM

  cypress/e2e/attachments.spec.js • 3 failed tests

View Output Video

Test		Artifacts
Test all attachment insertion methods > test if attachment folder is moved with the markdown file		Output Screenshots
Test all attachment insertion methods > test if attachment folder is copied when copying a markdown file		Output Screenshots
Test all attachment insertion methods > [share] check everything behaves correctly on the share target user side		Output Screenshots

  share.spec.js • 1 flaky test

View Output Video

Test		Artifacts
Open test.md in viewer > Share a file with download disabled shows an error		Output Screenshots

  api/SyncServiceProvider.spec.js • 1 flaky test

View Output Video

Test		Artifacts
Sync service provider > recovers from a dropped message		Output Screenshots

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[juliushaertl]

Will bump OCP composer package once other CI is good :)

[juliushaertl]

Version failures unrealted, fix in nextcloud/server#40348

[juliushaertl]

Remaining failures unrelated

[szaimen]

🎉🎉🎉🎉🎉

[maximelehericy]

@juliushaertl layout jumps does not occur on first page load, however, if you refresh the page or open and close an image from the viewer, layout jump still occurs.