#6 new toolbar menubuttons

[Donna Okazaki]

This patch implements the following:

1 - Feature request 494637 - requesting access to root
window menus (root menu and workspace menu) from the
toolbar. Two additional buttons have been added to the
end of the toolbar to pop up root and workspace menus.
The root menu button is supposed to look like a menu
being pulled down from a bar. The workspace menu button
is supposed to look like a grid of four workspaces.

2 - Left mouse button down on non-button regions of
toolbar will hide all visible menus.

[Donna Okazaki]

patch file to add toolbar menubuttons