[BUGFIX] ExtJS / normalize table > th

Browsers center text in <th> but the header text should
be aligned to the left. This issue arose when ExtJS
normalize reset was removed. Simple explicit definition.

Resolves: #57211
Releases: 6.2
Change-Id: Ib235d9e9e2beabac01a62b10cedea08faacbd896
Reviewed-on: https://review.typo3.org/28679
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters

typo3/sysext/t3skin/Resources/Public/Css/structure/element_table.css

@@ -65,6 +65,7 @@ table.t3-table td {
 	padding: 6px;
 	/** Height of sprite icon */
 	min-height: 16px;
+	text-align: left;
 }
 
 table.t3-table tr th:first-child,

typo3/sysext/t3skin/Resources/Public/Css/visual/element_table.css

@@ -38,6 +38,7 @@ table.t3-table thead th,
 table.t3-table thead td {
 	background-color: #666;
 	color: #fff;
+	font-weight: normal;
 }
 table.t3-table thead th a,
 table.t3-table thead td a {