fix(ui5-tab): expand tab height to tabcontainer height (#2360)

Author: fifoosid

packages/main/src/themes/TabContainer.css

@@ -82,6 +82,7 @@
 
 .ui5-tc__content {
 	position: relative;
+	display: flex;
 	height: calc(100% - var(--_ui5_tc_header_height)); /* the header height (tabs with icons and text) */
 	padding: 1rem;
 	background-color: var(--sapGroup_ContentBackground);
@@ -104,6 +105,7 @@
 .ui5-tc__contentItem {
     max-height: 100%;
 	display: flex;
+	flex-grow: 1;
 	overflow: auto;
 }