Add icon to validation dock action

Author: Mtk112

arho_feature_template/plugin.py

@@ -138,11 +138,9 @@ def initGui(self) -> None:  # noqa N802
 
         iface.mapCanvas().mapToolSet.connect(self.templater.digitize_map_tool.deactivate)
 
-        # Instantiate and add the Validation Dock Widget
         self.validation_dock = ValidationDock()
         iface.addDockWidget(Qt.RightDockWidgetArea, self.validation_dock)
 
-        # Connect visibilityChanged signal to sync toggle action
         self.validation_dock.visibilityChanged.connect(self.validation_dock_visibility_changed)
 
         # icons to consider:
@@ -179,11 +177,9 @@ def initGui(self) -> None:  # noqa N802
             add_to_toolbar=True,
         )
 
-        # Add the toggle action for the validation dock widget
         self.validation_dock_action = self.add_action(
-            "",
-            "Validointi virheet",
-            None,
+            text="Validointi virheet",
+            icon=QgsApplication.getThemeIcon("mActionEditNodesItem.svg"),
             toggled_callback=self.toggle_validation_dock,
             checkable=True,
             add_to_menu=True,