Darkened Icon colors. Started move to prefer svg loading
This MR darkens some icons in the Topography editor. (The darkening color can be specified inside the source code) Many of the icons have been updated to load as instead.
In the course of June we will update GitLab to the next major version 19.0. The update is expected to have only a limited impact on most users. Projects using the deprecated heroku/builder:22 image in CI/CD pipelines may require adjustments. Please check whether your project(s) may be affected and take the appropriate measures. Detailed information can be found here: https://docs.gitlab.com/update/deprecations/?removal_milestone=19.0
2026-06-17: Due to a major update (version 19.0) and PostgreSQL-Update (version 17.4) GitLab may be unavailable for some minutes between 13:00 and 17:00.
This MR darkens some icons in the Topography editor. (The darkening color can be specified inside the source code) Many of the icons have been updated to load as instead.