IDEA-79934 Run Configurations: Ability to specify another Run configuration as a 'before run' task

Visual improvements

platform/platform-api/src/com/intellij/ui/ToolbarDecorator.java

@@ -274,6 +274,10 @@ public abstract class ToolbarDecorator implements DataProvider, CommonActionsPan
     return this;
   }
 
+  public ToolbarDecorator setVisibleRowCount(int rowCount) {
+    return this;//do nothing by default
+  }
+
   public JPanel createPanel() {
     final CommonActionsPanel.Buttons[] buttons = getButtons();
     final JComponent contextComponent = getComponent();