fix(ui5-tabcontainer): remove scroll from empty tabs (#2148)

Author: fifoosid

packages/main/src/themes/Tab.css

@@ -1,7 +1,6 @@
 :host {
 	display: inline-block;
 	width: 100%;
-	height: 100%;
 }
 
 .ui5-tab-root {

packages/main/src/themes/TabContainer.css

@@ -107,11 +107,12 @@
 }
 
 .ui5-tc__contentItem {
-	height: 100%;
+    max-height: 100%;
+	display: flex;
 	overflow: auto;
 }
 
-.ui5-tc__contentItem--hidden {
+.ui5-tc__contentItem[hidden] {
 	display: none;
 }