Fix home dir being added as default svg and template path

Fixes #14662, #14652, #14883

Author: nyalldawson

src/app/qgsoptions.cpp

@@ -232,29 +232,25 @@ QgsOptions::QgsOptions( QWidget *parent, Qt::WindowFlags fl ) :
   }
 
   //local directories to search when looking for an SVG with a given basename
-  myPaths = mSettings->value( "svg/searchPathsForSVG", QDir::homePath() ).toString();
-  if ( !myPaths.isEmpty() )
+  QStringList svgPaths = QgsApplication::svgPaths();
+  if ( !svgPaths.isEmpty() )
   {
-    QStringList myPathList = myPaths.split( '|' );
-    QStringList::const_iterator pathIt = myPathList.constBegin();
-    for ( ; pathIt != myPathList.constEnd(); ++pathIt )
+    Q_FOREACH ( const QString& path, svgPaths )
     {
       QListWidgetItem* newItem = new QListWidgetItem( mListSVGPaths );
-      newItem->setText( *pathIt );
+      newItem->setText( path );
       newItem->setFlags( Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable );
       mListSVGPaths->addItem( newItem );
     }
   }
 
-  myPaths = mSettings->value( "composer/searchPathsForTemplates", "" ).toString();
-  if ( !myPaths.isEmpty() )
+  QStringList templatePaths = QgsApplication::composerTemplatePaths();
+  if ( !templatePaths.isEmpty() )
   {
-    QStringList myPathList = myPaths.split( '|' );
-    QStringList::const_iterator pathIt = myPathList.constBegin();
-    for ( ; pathIt != myPathList.constEnd(); ++pathIt )
+    Q_FOREACH ( const QString& path, templatePaths )
     {
       QListWidgetItem* newItem = new QListWidgetItem( mListComposerTemplatePaths );
-      newItem->setText( *pathIt );
+      newItem->setText( path );
       newItem->setFlags( Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable );
       mListComposerTemplatePaths->addItem( newItem );
     }

src/core/qgsapplication.cpp

@@ -696,7 +696,7 @@ QStringList QgsApplication::svgPaths()
   //defined by user in options dialog
   QSettings settings;
   QStringList myPathList;
-  QString myPaths = settings.value( "svg/searchPathsForSVG", QDir::homePath() ).toString();
+  QString myPaths = settings.value( "svg/searchPathsForSVG", QString() ).toString();
   if ( !myPaths.isEmpty() )
   {
     myPathList = myPaths.split( '|' );
@@ -715,7 +715,7 @@ QStringList QgsApplication::composerTemplatePaths()
   //defined by user in options dialog
   QSettings settings;
   QStringList myPathList;
-  QString myPaths = settings.value( "composer/searchPathsForTemplates", QDir::homePath() ).toString();
+  QString myPaths = settings.value( "composer/searchPathsForTemplates", QString() ).toString();
   if ( !myPaths.isEmpty() )
   {
     myPathList = myPaths.split( '|' );