Padding to textbox. remove config.line_padding

include/widgets/textbox.h

@@ -218,11 +218,12 @@ void textbox_delete ( textbox *tb, int pos, int dlen );
  */
 void textbox_moveresize ( textbox *tb, int x, int y, int w, int h );
 /**
+ * @param tb Handle to the textbox
  * Get the (estimated) with of a character, can be used to calculate window width.
  *
  * @returns the estimated width of a character.
  */
-int textbox_get_estimated_char_height ( void );
+int textbox_get_estimated_char_height ( const textbox *tb, int eh );
 /**
  * @param p The new default PangoContext
  *