From: https://github.com/GoldenCheetah/GoldenCheetah/pull/4924
Subject: Fix shared Trends/Plan sidebar overlapping the main menu bar

LTMSidebar is shared between TrendsView and PlanView and is only
reparented into the current view's splitter when that view's showEvent()
calls setSidebar(). If the app starts on a different view (Analysis is
the common case), the unembedded sidebar is an invisible bare child of
MainWindow — but not hidden — and renders as a stray widget at (0,0) on
top of the menu bar, hiding the first menu item.

Fix: hide() at the end of LTMSidebar's constructor; sidebar->show() in
AbstractView::setSidebar() once the widget is properly embedded.

--- a/src/Gui/AbstractView.cpp
+++ b/src/Gui/AbstractView.cpp
@@ -187,6 +187,11 @@
         // if the sidebar widget is already attached to another view's splitter,
         // it is moved to the new position within this view's splitter
         splitter->insertWidget(0, sidebar);
+
+        // a shared sidebar (see LTMSidebar) is kept hidden while it is not
+        // embedded anywhere; make sure it is actually shown now that it is
+        // properly parented into this view's splitter
+        sidebar->show();
     } 
 
     configChanged(CONFIG_APPEARANCE);
--- a/src/Gui/LTMSidebar.cpp
+++ b/src/Gui/LTMSidebar.cpp
@@ -255,6 +255,15 @@
 
     // setup colors
     configChanged(CONFIG_APPEARANCE);
+
+    // This sidebar is shared between TrendsView and PlanView (see LTMSidebarView)
+    // and is only reparented into the current view's splitter when that view's
+    // showEvent() calls setSidebar() -- see AbstractView::setSidebar(). Until
+    // then it is just a bare child of MainWindow, not managed by any layout, so
+    // if the application happens to start on a different view (e.g. Analysis)
+    // it would otherwise render as a stray overlapping widget at (0,0), on top
+    // of the menu bar. Keep it hidden until setSidebar() embeds and shows it.
+    hide();
 }
 
 void