fix(stackbar): destroy hpen, hbrush + hfont objs

This commit ensures that HPEN, HBRUSH and HFONT objects which are used
to draw stackbar tabs are explicitly destroyed with calls to
DeleteObject after ReleaseDC has been called.

re #855

komorebi/src/stackbar_manager/stackbar.rs

@@ -27,6 +27,7 @@ use windows::Win32::Foundation::WPARAM;
 use windows::Win32::Graphics::Gdi::CreateFontIndirectW;
 use windows::Win32::Graphics::Gdi::CreatePen;
 use windows::Win32::Graphics::Gdi::CreateSolidBrush;
+use windows::Win32::Graphics::Gdi::DeleteObject;
 use windows::Win32::Graphics::Gdi::DrawTextW;
 use windows::Win32::Graphics::Gdi::GetDC;
 use windows::Win32::Graphics::Gdi::Rectangle;
@@ -235,6 +236,9 @@ impl Stackbar {
             }
 
             ReleaseDC(self.hwnd(), hdc);
+            DeleteObject(hpen);
+            DeleteObject(hbrush);
+            DeleteObject(hfont);
         }
 
         Ok(())