add lv_ta_set_text_align()

lv_objx/lv_ta.h

@@ -160,6 +160,15 @@ void lv_ta_set_pwd_mode(lv_obj_t * ta, bool pwd_en);
  */
 void lv_ta_set_one_line(lv_obj_t * ta, bool en);
 
+/**
+ * Set the alignment of the text area.
+ * In one line mode the text can be scrolled only with `LV_LABEL_ALIGN_LEFT`.
+ * This function should be called if the size of text area changes.
+ * @param ta pointer to a text are object
+ * @param align the desired alignment from `lv_label_align_t`. (LV_LABEL_ALIGN_LEFT/CENTER/RIGHT)
+ */
+void lv_ta_set_text_align(lv_obj_t * ta, lv_label_align_t align);
+
 /**
  * Set a list of characters. Only these characters will be accepted by the text area
  * @param ta pointer to  Text Area