add .db to spatialite extensions (fixes #4919)

Author: jef-n

src/app/qgsnewspatialitelayerdialog.cpp

@@ -111,7 +111,7 @@ void QgsNewSpatialiteLayerDialog::on_toolButtonNewDatabase_clicked()
 {
   QString fileName = QFileDialog::getSaveFileName( this, tr( "New SpatiaLite Database File" ),
                      ".",
-                     tr( "SpatiaLite (*.sqlite *.db )" ) );
+                     tr( "SpatiaLite" ) + " (*.sqlite *.db)" );
 
   if ( fileName.isEmpty() )
     return;

src/providers/ogr/qgsogrprovider.cpp

@@ -1698,9 +1698,8 @@ QString createFilters( QString type )
       }
       else if ( driverName.startsWith( "SQLite" ) )
       {
-        myFileFilters += createFileFilter_( QObject::tr( "SQLite" ),
-                                            "*.sqlite" );
-        myExtensions << "sqlite";
+        myFileFilters += createFileFilter_( QObject::tr( "SQLite" ), "*.sqlite *.db" );
+        myExtensions << "sqlite" << "db";
       }
       else if ( driverName.startsWith( "UK .NTF" ) )
       {

src/providers/spatialite/qgsspatialitedataitems.cpp

@@ -293,7 +293,7 @@ void QgsSLRootItem::createDatabase()
 
   QString filename = QFileDialog::getSaveFileName( 0, tr( "New SpatiaLite Database File" ),
                      lastUsedDir,
-                     tr( "SpatiaLite (*.sqlite *.db )" ) );
+                     tr( "SpatiaLite" ) + " (*.sqlite *.db)" );
   if ( filename.isEmpty() )
     return;
 

src/providers/spatialite/qgsspatialitesourceselect.cpp

@@ -229,7 +229,7 @@ bool QgsSpatiaLiteSourceSelect::newConnection( QWidget* parent )
 
   QString myFile = QFileDialog::getOpenFileName( parent,
                    tr( "Choose a SpatiaLite/SQLite DB to open" ),
-                   lastUsedDir, QObject::tr( "SQLite DB (*.sqlite *.db);;All files (*)" ) );
+                   lastUsedDir, tr( "SpatiaLite DB" ) + " (*.sqlite *.db);;" + tr( "All files" ) + " (*)" );
 
   if ( myFile.isEmpty() )
     return false;