Check revision on commit

[pfeuffer]

Proposed changes

In the code editor there will be checks on refocus, whether the latest revision of the branch (or the repository if there are no branches) has changed. In this case, the user will get a warning and the commit button will stay disabled. If the user commits a file without noticing changes in the repository, the server will reject the change and a "concurrent modification error" will be shown.

This feature works with SCM-Manager 2.23.0 or later, but does not need this version. So the required SCM-Manager version has not been changed for this feature.

Your checklist for this pull request

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

Contributor:

• PR is well described and the description can be used as a commit message on squash
• Changelog entry file created in gradle/changelog or CHANGELOG.md is updated for plugins
• Feature has been tested with different permissions
• Documentation updated (only necessary for new features or changed behaviour)

Reviewer:

• The clean code principles are respected (CleanCode)
• All new code/logic is implemented on the right spot / "Should this be done here?"
• UI changes fits into the layout
• The UI views / components are responsive (mobile views)
• Correct translations are available

Checklist for branch merge request (not required for forks)

• Branch is green/blue on Jenkins
• Quality Gate passed on SonarQube

[eheimbuch]

Suggested change

	"revisionChanged": "Die aktuelle Revision hat sich geändert. Kopieren Sie ihre Änderungen und aktualisieren Sie die Seite, um die letzte Version der Datei zu erhalten."
	"revisionChanged": "Die aktuelle Revision hat sich geändert. Kopieren Sie Ihre Änderungen und aktualisieren Sie die Seite, um die letzte Version der Datei zu erhalten."