Refactor TabPanel Heading Assignment Logic

- Simplified the logic for setting the Heading property in the TabPanel component.
- Replaced the if-else statement with a ternary operator for improved readability and maintainability.
- Ensured that the functionality remains unchanged and verified correct assignment of headings.

Oqtane.Client/Modules/Controls/TabPanel.razor

@@ -36,14 +36,7 @@ else
 
         Parent.AddTabPanel((TabPanel)this);
 
-        if (string.IsNullOrEmpty(Heading))
-        {
-            Heading = Localize(nameof(Name), Name);
-        }
-        else
-        {
-            Heading = Localize(nameof(Heading), Heading);
-        }
+        Heading = string.IsNullOrEmpty(Heading) ? Localize(nameof(Name), Name) : Localize(nameof(Heading), Heading);
     }
 
     public string DisplayHeading()