Table header cell style (#586)

* Make table header cell strong

* Change tanle header border radius

Author: kapantzak

src/components/table/body/header/cell.js

@@ -104,6 +104,7 @@ const BodyHeaderCell = ({
               {...column.columnDef.labelProps}
               sorting={column.getIsSorted()}
               sortable={column.getCanSort()}
+              strong
             >
               {flexRender(column.columnDef.header, header.getContext())}
             </Label>

src/components/table/header/index.js

@@ -32,14 +32,15 @@ const Header = ({
 
   return (
     <Flex
+      data-testid="netdata-table-header-container"
       data-noprint
       width="100%"
       zIndex={10}
       background="mainBackground"
       gap={1}
       alignItems="center"
       padding={[2, 3]}
-      round
+      round={{ side: "top", size: 1 }}
       border={{ side: ["vertical", "top"] }}
       flexWrap
       {...tableMeta.bulkActionsStyles}