add lv_components as src/extra and minor fixes

examples/widgets/win/lv_win_example_1.c

@@ -0,0 +1,40 @@
+#include "../../../lvgl.h"
+#include <stdio.h>
+#if LV_USE_WIN
+
+
+static void event_handler(lv_obj_t * obj, lv_event_t event)
+{
+    if(event == LV_EVENT_CLICKED) {
+        printf("Value: %d\n", lv_obj_get_child_id(obj));
+    }
+}
+
+void lv_ex_win_1(void)
+{
+    lv_obj_t * win = lv_win_create(lv_scr_act(), LV_SIZE_AUTO);
+    lv_win_add_btn(win, LV_SYMBOL_LEFT, 40, 40, event_handler);
+    lv_win_add_title(win, "A title");
+    lv_win_add_btn(win, LV_SYMBOL_RIGHT, 40, 40, event_handler);
+    lv_win_add_btn(win, LV_SYMBOL_CLOSE, 40, 40, event_handler);
+
+    lv_obj_t * cont = lv_win_get_content(win);  /*Content can be aded here*/
+    lv_obj_t * label =  lv_label_create(cont, NULL);
+    lv_label_set_text(label, "This is\n"
+                             "a pretty\n"
+                             "long text\n"
+                             "to see how\n"
+                             "the window\n"
+                             "becomes\n"
+                             "scrollable.\n"
+                             "\n"
+                             "\n"
+                             "Some more\n"
+                             "text to be\n"
+                             "sure it\n"
+                             "overflows. :)");
+
+
+}
+
+#endif