ESC/GRAVE/TILDE better handling (#1307)

* revise HHKB bootloader_size to 4096 such that sw reset works

* cleanup esr/grave/tilde handling function

keyboards/clueboard/keymaps/mac_optimized/keymap.c

@@ -50,35 +50,28 @@ const uint16_t PROGMEM fn_actions[] = {
 
 void action_function(keyrecord_t *record, uint8_t id, uint8_t opt) {
   static uint8_t mods_pressed;
-  static bool mod_flag;
 
   switch (id) {
     case 0:
       /* Handle the combined Grave/Esc key
        */
-      mods_pressed = get_mods()&GRAVE_MODS; // Check to see what mods are pressed
-
       if (record->event.pressed) {
         /* The key is being pressed.
          */
+        mods_pressed = get_mods()&GRAVE_MODS; // Check to see what mods are pressed
         if (mods_pressed) {
-          mod_flag = true;
+          register_code(KC_GRV);
-          add_key(KC_GRV);
-          send_keyboard_report();
         } else {
-          add_key(KC_ESC);
+          register_code(KC_ESC);
-          send_keyboard_report();
         }
       } else {
         /* The key is being released.
          */
-        if (mod_flag) {
+        if (mods_pressed) {
-          mod_flag = false;
+          mods_pressed = false;
-          del_key(KC_GRV);
+          unregister_code(KC_GRV);
-          send_keyboard_report();
         } else {
-          del_key(KC_ESC);
+          unregister_code(KC_ESC);
-          send_keyboard_report();
         }
       }
       break;