v5.19.0

What's Changed

• Rdef query checks by @kkoz in #443
• Show spinner while loading and saving Comments by @will-moore in #426
• OMERO.web search: fix handling of server errors by @sbesson in #446
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #444
• Thumbnail zooming by @will-moore in #411
• Split view figure big images by @will-moore in #412
• Add change log for 5.19.0 by @knabar in #449

Full Changelog: v5.18.0...v5.19.0