Implement preliminary menu functions
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		@@ -30,11 +30,11 @@ struct lcd_menu;
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enum menu_entry_func_entry {MENU_ENTRY_FIRST_ENTER, MENU_ENTRY_CONTINUE, MENU_ENTRY_DROPBACK};
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typedef enum menu_func_ret_t (*menu_func_t)(struct lcd_menu *menu, enum menu_entry_func_entry entry_type,
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typedef void (*menu_func_t)(struct lcd_menu *menu, enum menu_entry_func_entry entry_type,
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					    void *parent);
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struct menu_inputs {
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	uint16_t rotary_encoder_val;
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	int16_t rotary_encoder_delta;
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	enum button_state push_button;
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};
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@@ -42,8 +42,9 @@ struct lcd_menu {
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	menu_func_t active_entry;
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	menu_func_t root_entry;
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	enum menu_entry_func_entry active_entry_type;
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	menu_func_t init_parent;
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	struct menu_inputs inputs;
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	char lcd_buffer[LCD_ROW_COUNT][21];
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	void (*update_display)(uint8_t row, const char *data);
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};
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struct menu_list {
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@@ -52,15 +53,15 @@ struct menu_list {
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	const menu_func_t *submenu_list;
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};
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void menu_handle(struct lcd_menu *menu, uint16_t rotary_encoder_value, enum button_state push_button);
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void menu_handle(struct lcd_menu *menu, uint16_t rotary_encoder_delta, enum button_state push_button);
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void menu_init(struct lcd_menu *menu, menu_func_t root_node);
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void menu_init(struct lcd_menu *menu, menu_func_t root_node, void (*display_update)(uint8_t row, const char *data));
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void menu_entry_dropback(struct lcd_menu *menu, menu_func_t parent_func);
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void menu_entry_enter(struct lcd_menu *menu, menu_func_t parent_func, bool handle_immediately);
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void menu_override_lcd_output(uint8_t row_num, char *text);
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void menu_override_lcd_output(struct lcd_menu *menu, uint8_t row_num, const char *text);
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void menu_list_display(struct menu_list *list, uint8_t top_row, uint8_t bottom_row);
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