IDEA-163208: minor fixes of showing logic

rename onShow -> onBeforeShow, call it before show

platform/platform-impl/src/com/intellij/ui/mac/touchbar/TouchBar.java

@@ -129,7 +129,7 @@ public class TouchBar implements NSTLibrary.ItemCreator {
     NST.selectItemsToShow(myNativePeer, ids, ids.length);
   }
 
-  public void onShow() {}
+  public void onBeforeShow() {}
   public void onHide() {}
 
   private TBItem findItem(String uid) {

platform/platform-impl/src/com/intellij/ui/mac/touchbar/TouchBarActionBase.java

@@ -49,12 +49,13 @@ public class TouchBarActionBase extends TouchBarProjectBase implements Execution
     ActionManager.getInstance().removeTransparentTimerListener(myTimerListener);
   }
 
-  public void onShow() {
-    ActionManager.getInstance().addTransparentTimerListener(500, myTimerListener); // NOTE: delay param doesn't affect anything
-  }
-  public void onHide() {
-    ActionManager.getInstance().removeTransparentTimerListener(myTimerListener);
+  @Override
+  public void onBeforeShow() {
+    _updateActionItems();
+    ActionManager.getInstance().addTransparentTimerListener(500/*delay param doesn't affect anything*/, myTimerListener);
   }
+  @Override
+  public void onHide() { ActionManager.getInstance().removeTransparentTimerListener(myTimerListener); }
 
   TBItemAnActionButton addAnActionButton(String actId) {
     return addAnActionButton(ActionManager.getInstance().getAction(actId), true, TBItemAnActionButton.SHOWMODE_IMAGE_ONLY, myComponent, null);

platform/platform-impl/src/com/intellij/ui/mac/touchbar/TouchBarDebuggerAlt.java

@@ -10,7 +10,6 @@ public class TouchBarDebuggerAlt extends TouchBarActionBase {
   public TouchBarDebuggerAlt(@NotNull Project project, Component component) {
     super("debugger_alt", project, component);
 
-    addAnActionButton("ViewBreakpoints", false);
     addFlexibleSpacing();
     addAnActionButton("ViewBreakpoints", false);
     addSpacing(true);

platform/platform-impl/src/com/intellij/ui/mac/touchbar/TouchBarsManager.java

@@ -184,7 +184,7 @@ public class TouchBarsManager {
 
     ourTouchBarStack.remove(bar);
     ourTouchBarStack.push(bar);
-    ourTouchBarChanger.updateTouchBar(bar.get());
+    _setBarContainer(bar);
   }
 
   synchronized public static void closeTouchBar(BarContainer tb) {
@@ -235,9 +235,9 @@ public class TouchBarsManager {
       if (myCurrentBar != null)
         myCurrentBar.onHide();
       myCurrentBar = myNextBar;
-      NST.setTouchBar(myCurrentBar);
       if (myCurrentBar != null)
-        myCurrentBar.onShow();
+        myCurrentBar.onBeforeShow();
+      NST.setTouchBar(myCurrentBar);
     }
   }