QGIS now supports opening messages in a specific tab of the Message Log Panel.
This can be used, for instance, to open a specific tab directly for a given provider or plugin.
This is achieved by extending the openMessageLog method to accept the tab name as a parameter. If the provided tab name cannot be found, the panel will be displayed using its existing state.
Included with this change is the extension of the iface method, iface.openMessageLog( tab_name ).