primitivus: added a FOCUS_EXTRA key (default: "ctrl f") which can be used to focus a main part:

- ctrl f + 1 (or m) to focus menu
    - ctrl f + 2 (or b) to focus body
    - ctrl f + 3 (or n) to focus notifications bar
    - ctrl f + 4 (or e) to focus edit bar

frontends/src/primitivus/keys.py

@@ -55,6 +55,9 @@ action_key_map.update(
 
         #card game
         ("card_game", "CARD_SELECT"): ' ',
+
+        #focus
+        ("focus", "FOCUS_EXTRA"): "ctrl f",
         })