add action button plot info screen

lib/presentation/screens/plot_detail/sc_plot_information.dart

 
   _actionAppBar() {
     IconButton iconButton;
-    if (_plot.id != null) {
-      iconButton = IconButton(
-        icon: Icon(
-          Icons.done,
-          color: COLOR_CONST.DEFAULT,
-        ),
-        onPressed: () {},
-      );
-      return <Widget>[iconButton];
-    }
-    return <Widget>[Container()];
+    iconButton = IconButton(
+      icon: Icon(
+        Icons.done,
+      ),
+      onPressed: () {},
+    );
+    return <Widget>[iconButton];
   }
 
   @override