SUPERTABs – Custom Icon PNG(Preferences) — v1.3.3▶️✅
Tab-Groups Icon : New feature in SUPERTABs is designed to help you “remember easily and see quickly” what each tab group is for. The concept is simple: assign an icon to the Tab-Group you want, and all Addons/Tabs inside that Tab-Group will display the same icon as the Tab-Group.
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Improved: Tab Icons Can Show on Add-on’s Panel Headers

Icons you assign to add-ons and tabs can now appear in front of the panel name on the N-panel, not just on the sidebar tab. Custom PNG images work too.
Turn it on with the Panel Header Icons toggle in Display Settings (all editors, requires Apply once). The add-on's own header buttons are always kept.

The gear button next to the toggle opens one popup with two instant options (no Apply needed): Source — your custom icon, or the source add-on's own icon where it has one (falls back to yours); Position — in front of the name, or at the far end of the header.

Source also changes the item buttons (Main Items, Groups & Addons,
Favorites, Ejected tabs), and the Set Icon window previews the add-on's
own icon with a Use Original button.

NOTE : Header panel Icon Assigned need Apply Settings for Re-register panel to display an icons on header panel.
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