Add methods to change the selected tab in the Shuffleboard app (#1448)

wpilibc/src/main/native/include/frc/shuffleboard/ShuffleboardRoot.h

@@ -45,6 +45,22 @@ class ShuffleboardRoot {
    * actuators.
    */
   virtual void DisableActuatorWidgets() = 0;
+
+  /**
+   * Selects the tab in the dashboard with the given index in the range
+   * [0..n-1], where <i>n</i> is the number of tabs in the dashboard at the time
+   * this method is called.
+   *
+   * @param index the index of the tab to select
+   */
+  virtual void SelectTab(int index) = 0;
+
+  /**
+   * Selects the tab in the dashboard with the given title.
+   *
+   * @param title the title of the tab to select
+   */
+  virtual void SelectTab(wpi::StringRef title) = 0;
 };
 
 }  // namespace frc