added plugin tag for QgsMessageLog messages

Author: luipir

python/plugins/db_manager/db_tree.py

@@ -164,7 +164,7 @@ def addLayer(self):
             layers = QgsMapLayerRegistry.instance().addMapLayers([layer])
             if len(layers) != 1:
                 QgsMessageLog.logMessage(
-                    self.tr("%1 is an invalid layer - not loaded").replace("%1", layer.publicSource()))
+                    self.tr("%1 is an invalid layer - not loaded").replace("%1", layer.publicSource()), "DBManagerPlugin")
                 msgLabel = QLabel(self.tr(
                     "%1 is an invalid layer and cannot be loaded. Please check the <a href=\"#messageLog\">message log</a> for further info.").replace(
                     "%1", layer.publicSource()), self.mainWindow.infoBar)

python/plugins/db_manager/layer_preview.py

@@ -84,7 +84,7 @@ def _clear(self):
             ## skip TypeError and generic Exceptions fixes #15868
             ## generally due the remove of self.item object or C++ referenced object
             except Exception as ex:
-                QgsMessageLog.logMessage(unicode(ex))
+                QgsMessageLog.logMessage(unicode(ex), "DBManagerPlugin")
 
         self.item = None
         self.dirty = False