[browser] Always open xlsx/csv/ods files as layers, instead of just

checking the file extension (by default)

These formats are inexpensive to open, and doing so allows browser to
display all sheets from the files in the tree (and gives correct
'no geometry' icon for the file)

Author: nyalldawson

src/providers/ogr/qgsogrdataitems.cpp

@@ -672,12 +672,20 @@ QgsDataItem *QgsOgrDataItemProvider::createDataItem( const QString &pathIn, QgsD
       QStringLiteral( "db" ),
       QStringLiteral( "gdb" ) };
 
+  // these extensions are trivial to read, so there's no need to rely on
+  // the extension only scan here -- avoiding it always gives us the correct data type
+  // and sublayer visiblity
+  static QStringList sSkipFastTrackExtensions { QStringLiteral( "xlsx" ),
+      QStringLiteral( "ods" ),
+      QStringLiteral( "csv" ),
+      QStringLiteral( "nc" ) };
+
   // Fast track: return item without testing if:
   // scanExtSetting or zipfile and scan zip == "Basic scan"
   // netCDF files can be both raster or vector, so fallback to opening
   if ( ( scanExtSetting ||
          ( ( is_vsizip || is_vsitar ) && scanZipSetting == QLatin1String( "basic" ) ) ) &&
-       suffix != QLatin1String( "nc" ) )
+       !sSkipFastTrackExtensions.contains( suffix ) )
   {
     // if this is a VRT file make sure it is vector VRT to avoid duplicates
     if ( suffix == QLatin1String( "vrt" ) )