v11.1.0

Added

• Markdown editing support by @vmiklos in #5920

Fixed

• Authorization in template field endpoints by @rikled in #5917
• Resized the settings iframe to its reported height by @timar in #5912
• Post message origin verification by @elzody in #5907

Other

• Temporarily test only against Collabora nightly build by @elzody in #5895
• Development dependency updates