Add id="current-color-scheme" to collapse-all icons
Summary:
collapse-all icons have no id="current-color-scheme" attribute in the <style> element, so they do not respect the foreground color and these icons are hardly visible in dark color themes.
Special thanks: David Hurka, who reported the bug and suggested the change
BUG: 409546
Usage in Okular, Before:
After:
Reviewers: VDG, davidhurka, ndavis
Reviewed By: VDG, davidhurka, ndavis
Subscribers: ndavis, davidhurka, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D22297
