fix: eui icon requires aria label

Author: KatoakDR

electron/renderer/components/grid/grid-item.tsx

@@ -329,6 +329,7 @@ export const GridItem: React.FC<GridItemProps> = (
                 justifyContent="flexEnd"
               >
                 <EuiButtonIcon
+                  aria-label="Close"
                   title="Close"
                   iconType="cross"
                   color="accent"

electron/renderer/components/sidebar/sidebar-item.tsx

@@ -47,6 +47,7 @@ export const SidebarItem: React.FC<SidebarItemProps> = (
 
   const buttonElmt = (
     <EuiButtonIcon
+      aria-label={label}
       onClick={onClickButton}
       iconType={iconType}
       color={iconColor}