Fix color cells going over the column name (#163) (#167)

bin/cdb.css

@@ -128,7 +128,7 @@
 }
 .cdb .cdb-sheet:not(.cdb-sub-sheet) > thead.head > th {
   position: sticky;
-  z-index: 1;
+  z-index: 10;
   top: 0;
 }
 .cdb .cdb-sheet tr.head,

bin/cdb.less

@@ -141,7 +141,7 @@
 
 		&:not(.cdb-sub-sheet) > thead.head > th {
 			position: sticky;
-			z-index: 1;
+			z-index: 10;
 			top: 0;
 		}
 

bin/style.css

@@ -525,7 +525,7 @@ input[type=checkbox]:checked:after {
   bottom: 0px;
   padding-top: 0px;
   padding-bottom: 5px;
-  z-index: 1;
+  z-index: 10;
 }
 .hide-tabs.tabs-bottom > .tabs-header > div {
   border-top: none;

bin/style.less

@@ -583,7 +583,7 @@ input[type=checkbox] {
 		bottom : 0px;
 		padding-top : 0px;
 		padding-bottom : 5px;
-		z-index: 1;
+		z-index: 10;
 		&>div {
 			border-top : none;
 			border-top-right-radius: 0;