New Dirty Indicator Should be Lighter for Inactive Tabs in Light Mode

<!-- Thanks for suggesting an enhancement! --> <!-- The following template is highly recommended to trigger an efficient course of actions: it's pretty suitable if you're not familiar with the project as it will guide you in sharing the most important information. If you're not comfortable with this template for your particular report, feel free to erase it and write your report from scratch --> The new dirty indicator replaces the astrisk with a bullet at the place of the close indicator. In darkmode for inactive dirty tabs the bullet is shown a bit darker to better show that the tab is inactive. See the the `TargetInfo.java` tab in the following screenshot: <img width="691" height="43" alt="Image" src="https://github.com/user-attachments/assets/8ba7e1b7-b45a-467b-9c22-069b26e85273" /> When comparing this to a light mode screenshot: <img width="691" height="43" alt="Image" src="https://github.com/user-attachments/assets/4c95e9e0-2627-4575-8be0-39a8a09c00dd" /> The bullets have the same color independent of active or non-active tab. The correct solution would be that the dirty bullet of the `TargetInfo.java` tab should be a bit lighter similar to the dark mode. FYI @vogella