Add spacing above function editor combo. API docs for QgsLayerDefinition

python/core/qgslayerdefinition.sip

@@ -1,11 +1,21 @@
+/**
+ * @brief The QgsLayerDefinition class holds generic methods for loading/exporting QLR files.
+ *
+ * QLR files are an export of the layer xml including the style and datasource location.  There is no link
+ * to the QLR file once loaded.  Consider the QLR file a mini project file for layers and styles.  QLR
+ * files also store the layer tree info for the exported layers, including group information.
+ */
 class CORE_EXPORT QgsLayerDefinition
 {
 %TypeHeaderCode
 #include <qgslayerdefinition.h>
 %End
 public:
+  /* Loads the QLR at path into QGIS.  New layers are added to rootGroup and the map layer registry*/
   static bool openLayerDefinition( const QString & path, QgsLayerTreeGroup* rootGroup, QString &errorMessage /Out/ );
+  /* Loads the QLR from the XML document.  New layers are added to rootGroup and the map layer registry */
   static bool openLayerDefinition( QDomDocument doc, QgsLayerTreeGroup* rootGroup, QString &errorMessage /Out/ );
+  /* Export the selected layer tree nodes to a QLR file */
   static bool exportLayerDefinition( QString path, QList<QgsLayerTreeNode*> selectedTreeNodes, QString &errorMessage /Out/ );
 };
 

src/core/qgslayerdefinition.h

@@ -5,6 +5,10 @@
 
 /**
  * @brief The QgsLayerDefinition class holds generic methods for loading/exporting QLR files.
+ *
+ * QLR files are an export of the layer xml including the style and datasource location.  There is no link
+ * to the QLR file once loaded.  Consider the QLR file a mini project file for layers and styles.  QLR
+ * files also store the layer tree info for the exported layers, including group information.
  */
 class CORE_EXPORT QgsLayerDefinition
 {

src/ui/qgsexpressionbuilder.ui

@@ -577,6 +577,9 @@
          <property name="sizeConstraint">
           <enum>QLayout::SetDefaultConstraint</enum>
          </property>
+         <property name="topMargin">
+          <number>3</number>
+         </property>
          <item>
           <widget class="QToolButton" name="btnRun">
            <property name="text">