Adjust theme color based on file type to match the Collabora branding bar #5269
Description
Experiment with the theme-color meta tag to see if we can set it dynamically to adjust the Safari menubar color, currently it stays blue but could for the case of the screenshot be green:
Some relevant additional links:
https://roger.zone/theme-color-preview/
https://benfrain.com/ios26-safari-theme-color-tab-tinting-with-fixed-position-elements/
https://addons.mozilla.org/en-US/firefox/addon/adaptive-tab-bar-colour/