Add bold caption text on inactivated tabs

Description

Add Bold caption text for tabs that opened in background

Who's implementing?

• I'm willing to implement this feature myself

The problem

Sometimes people can't tell if they've viewed a tab, this happens more often when many tabs are opened. In order to imorove work efficiency, I think inactivated tab title should be marked with bold text.

Possible solutions

if a tab is opened in background: show bold caption text; else: show normal caption text;

if a tab opened in background become foreground tab: change bold caption text to normal caption text;

Alternatives

No response

Additional context

If completed, this feature can be another toggle in flags