Add Ctrl and Alt modifier keys.

data/keyboards/terminal.yaml

@@ -4,7 +4,7 @@ outlines:
     altline: { width: 70, height: 50 }
     spaceline: { width: 160, height: 50 }
     special: { width: 35.33, height: 50 }
-    action: { width: 100, height: 35 }
+    action: { width: 85, height: 35 }
     fkey: { width: 41, height: 50 }
 
 views:
@@ -14,28 +14,28 @@ views:
         - "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"
-        - "Tab ↑ ↓ ← →"
+        - "Ctrl Tab ↑ ↓ ← →"
     upper:
         - "! @ # $ % ^ & * ( )"
         - "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"
-        - "Esc PgUp PgDn Home End"
+        - "Alt Esc PgUp PgDn Home End"
     symbols:
         - "~ ` ´ - _ + = ° © ®"
         - "[ ] { } \\ | ÷ × √"
         - "; : ' \" · € £ ¥"
         - "Del / ? § π τ µ ¶ BackSpace"
         - "show_letters show_eschars preferences         space        < > Return"
-        - "Esc PgUp PgDn Home End"
+        - "Ctrl Tab ↑ ↓ ← →"
     eschars:
         - "F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12"
         - "ä è é ö ü Ä È É Ö Ü"
         - "à â ê î ô À Â È Î Ô"
         - "Del  « » ç Ç æ œ ß  BackSpace"
         - "show_symbols show_eschars preferences         space        „ “ Return"
-        - "Esc PgUp PgDn Home End"
+        - "Alt Esc PgUp PgDn Home End"
 
 buttons:
     Shift_L:
@@ -45,6 +45,14 @@ buttons:
                 unlock_view: "base"
         outline: "altline"
         icon: "key-shift"
+    Ctrl:
+        modifier: "Control"
+        outline: "action"
+        label: "Ctrl"
+    Alt:
+        modifier: "Alt"
+        outline: "action"
+        label: "Alt"
     BackSpace:
         outline: "altline"
         icon: "edit-clear-symbolic"