Fix info message after saving page content twice

[deen13]

Short description

This pull request addresses the issue of Tinymce adding whitespace to the content by setting indent: false in the Tinymce configuration. Currently, the added whitespace by Tinymce causes our backend to incorrectly determine whether the content has been edited or not. This is evident when saving a newly created page for the second time, as it erroneously indicates that changes have been saved even when there are none.

Further Explanation: https://stackoverflow.com/a/39489073 Demonstration: https://github.com/digitalfabrik/integreat-cms/assets/13850172/e40e868e-87a5-4972-818d-378c8014aae5

Proposed changes

• Set indent: false in the Tinymce configuration to prevent the addition of whitespace to the content.

Resolved issues

Fixes: #2673

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