Add Menu key.

data/keyboards/terminal.yaml

@@ -1,6 +1,7 @@
 ---
 outlines:
     default: { width: 50, height: 50 }
+    menu: { width: 100, height: 50 }
     altline: { width: 70, height: 50 }
     spaceline: { width: 160, height: 50 }
     special: { width: 35.33, height: 50 }
@@ -20,7 +21,7 @@ views:
         - "Q W E R T Y U I O P"
         - "A S D F G H J K L"
         - "Shift_L   Z X C V B N M  BackSpace"
-        - "show_symbols show_eschars preferences         space        < > Return"
+        - "show_symbols show_eschars preferences         space        Menu Return"
         - "Alt Esc PgUp PgDn Home End"
     symbols:
         - "~ ` ´ - _ + = ° © ®"
@@ -57,6 +58,9 @@ buttons:
         outline: "altline"
         icon: "edit-clear-symbolic"
         action: "erase"
+    Menu:
+        outline: "menu"
+        keysym: "Menu"
     preferences:
         action: "show_prefs"
         outline: "special"