fix: Icon theme on setting and new column icon

frontend/app_flowy/lib/plugins/grid/presentation/widgets/header/grid_header.dart

@@ -186,7 +186,10 @@ class CreateFieldButton extends StatelessWidget {
         ),
         hoverColor: theme.shader6,
         onTap: () {},
-        leftIcon: svgWidget("home/add"),
+        leftIcon: svgWidget(
+          "home/add",
+          color: theme.iconColor,
+        ),
       ),
       popupBuilder: (BuildContext popover) {
         return OverlayContainer(

frontend/app_flowy/lib/plugins/grid/presentation/widgets/toolbar/grid_toolbar.dart

@@ -59,8 +59,10 @@ class _SettingButton extends StatelessWidget {
       child: FlowyIconButton(
         width: 22,
         hoverColor: theme.hover,
-        icon: svgWidget("grid/setting/setting")
-            .padding(horizontal: 3, vertical: 3),
+        icon: svgWidget(
+          "grid/setting/setting",
+          color: theme.iconColor,
+        ).padding(horizontal: 3, vertical: 3),
       ),
       popupBuilder: (BuildContext context) {
         return _GridSettingListPopover(settingContext: settingContext);