Fix 1287: Focus return to arranger window when pianoroll closed

Author: Tim

src/ChangeLog

@@ -1,3 +1,6 @@
+17.10.2024
+    - Fix issue 1287: Focus doesn't return to arranger window when pianoroll closed. (Tim)
+      In MusE::toplevelDeleting(), call TopWin::focusCanvas() to direct focus to the canvas.
 16.10.2024
     - Event List Editor: Fixed cannot open multiple parts. (Tim)
       Thanks to forum user 'enaiel' for spotting that.

src/muse/app.cpp

@@ -3727,6 +3727,11 @@ void MusE::toplevelDeleting(MusEGui::TopWin* tl)
 
                         bringToFront((*lit)->widget());
 
+                        // If the TopWin has a canvas and a focusCanvas(), call it to focus the canvas.
+                        TopWin* tw = dynamic_cast<TopWin*>( (*lit)->widget());
+                        if(tw)
+                          tw->focusCanvas();
+
                         break;
                     }
             }