Add missing doc strings

Author: NathanW2

src/gui/attributetable/qgsfieldconditionalformatwidget.h

@@ -65,8 +65,17 @@ class GUI_EXPORT QgsFieldConditionalFormatWidget : public QWidget, private Ui::Q
      */
     void reset();
 
+    /**
+     * @brief Set the presets that can be used for quick pick
+     * @param styles A list of styles used as presets
+     */
     void setPresets( QList<QgsConditionalStyle> styles );
 
+    /**
+     * @brief The default presets for the widget.  Normally set when the widget is
+     * created however called setPresets will override the default styles.
+     * @return List of default presets.
+     */
     QList<QgsConditionalStyle> defaultPresets() const;
 
   signals: