TF-1427 Move composer button to dashboard view on web

core/lib/presentation/utils/responsive_utils.dart

@@ -6,6 +6,7 @@ class ResponsiveUtils {
 
   static const double defaultSizeLeftMenuMobile = 375;
   static const double defaultSizeDrawer = 320;
+  static const double defaultSizeMenu = 256;
 
   final int heightShortest = 600;
 
@@ -13,8 +14,6 @@ class ResponsiveUtils {
   final int minTabletWidth = 600;
   final int minTabletLargeWidth = 900;
 
-  final double defaultSizeMenu = 256;
-
   final double _loginTextFieldWidthSmallScreen = 280.0;
   final double _loginTextFieldWidthLargeScreen = 320.0;
   final double _loginButtonWidth = 240.0;