Poor visibility of unread messages on dark themes

[ksz16]

Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
• [ ] I optionally donated to support the Fossify mission.

Feature description

Unread messages are poorly distinguished from read messages if you use a dark theme (on light themes it looks fine).

Why do you want this feature?

This would make it easier to use the application.

Additional information

In the latest Fossify Phone update the visibility of missed, received, outgoing calls in Call History tab has been brilliantly improved by adjusting the proper contrast ratio. Would it be possible to adjust this ratio also for unread messages in Fossify Messages? Alternatively, a slight change of colors and bold fonts or a change of background color could help.