Fix clang-format violation in app shortcut feature (#3)

* Fix trailing whitespace in DisplayApp.h (clang-format violation)

Co-authored-by: joelghill <1980543+joelghill@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: joelghill <1980543+joelghill@users.noreply.github.com>

Author: Copilot

src/displayapp/DisplayApp.h

@@ -120,7 +120,7 @@ namespace Pinetime {
       Apps currentApp = Apps::None;
       Apps previousApp = Apps::None;
       Apps returnToApp = Apps::None;
-      
+
       FullRefreshDirections returnDirection = FullRefreshDirections::None;
       TouchEvents returnTouchEvent = TouchEvents::None;