fix(ui5-tabcontainer): fix overflow button visibility (#4836)

TeodorTaushanov · web-flow · commit 8e67748af46f · 2022-03-02T15:29:31.000+02:00
Fixes #4690
diff --git a/packages/main/src/TabContainer.js b/packages/main/src/TabContainer.js
@@ -239,6 +239,7 @@ const metadata = {
 		_startOverflowText: {
 			type: String,
 			noAttribute: true,
+			defaultValue: "0",
 		},
 
 		_endOverflowText: {
