MenuItem mnemonics key binding conflict

[jkcoding7]

It is not possible to select "Export Image" using mnemonics to navigate the menu items. It has the same key binding, "E,' as the top level key binding for "Edit". If a user attempts to press "E" in the window below, the focus will shift to the "Edit" sub-level menu items instead of executing "Export Image."

[jkcoding7]

Additionally, "Exit," does not have a mnemonic key binding because mnemonics are case sensitive and it should be set to the lowercase "x"