Shortcut for show/hide week-ends

Toggling to show/hide week-ends should be an action with a shortcut, not requiring to take the mouse en click a checkbox at the bottom of a menu.

Also, finding the menu is not always easy: I had to think to find that "Month" was clickable and that it was under that. It should probably be: "View: Month" (and an arrow would help remember it's a menu)