add-editor-keymap-functions

Given a keymap% object, the keymap is loaded with mappable functions that apply to all editor<%> objects:

• ``copy-clipboard''
• ``copy-append-clipboard''
• ``cut-clipboard''
• ``cut-append-clipboard''
• ``paste-clipboard''
• ``delete-selection''
• ``clear-selection''
• ``undo''
• ``redo''
• ``select-all''

• (add-editor-keymap-functions keymap) -> void
      keymap : keymap% object