+ UI: checkboxes

F Login: Fixes scenario when credentials are incorrect
R UI: group -> refactors key processing

src/widget/checkbox.h

@@ -0,0 +1,17 @@
+#ifndef CHECKBOX_H
+#define CHECKBOX_H
+
+#include <widget_core.h>
+#include <stdint.h>
+
+typedef struct {
+  widget_t w;
+  bool is_disabled;
+  bool value;
+} checkbox_t;
+
+bool checkbox_default_key_action(callback_args_t *args);
+checkbox_t *init_checkbox(WINDOW **win, widget_t *w_parent, char *label);
+int32_t draw_checkbox(checkbox_t *cbx, uint32_t active_id);
+void destroy_checkbox(checkbox_t *cbx);
+#endif