Bug 5962: Keyboard shortcut (Alt+E) fails for series slot with expression
Bug Number: 5962
Release notes (y/n): Yes
For Release Nums: 7.0.8 and 7.1

Alt-E had been an ambiguous shortcut.  It was used in each of the following 
two ways:

(1) When pressing the ALT key, the menubar is given "focus" (keyboard input 
    focus).  In that state, the menu items can have a shortcut indicated by 
    one its letters UNDERLINED.  This was true for the slot dialog's "Edit" 
    menu.

(2) The Expression menu's "Evaluate" function has the explicit "Alt+E" 
    shortcut.

The first use is less important.  Even without that shortcut, that menu 
can be operated WITH ONLY KEYS (i.e. without the mouse) by pressing ALT 
and using the right arrow key to move to the Edit menu, and the down arrow 
key to move into that menu.

This bug was addressed by providing the "Edit" menu's "ALT" shortcut 
ONLY IF the Expression menu is shown (for RPL expression series slots).
(This problem did not apply to SCALAR slots with RPL expression).

See the change in Q3GUI/SlotQtDlg.cpp, method: SlotQtDlg::buildMenus().