fix flickering arrows

Summary:
this reintroduces the else removed in 049168b9bb
this broke the animations for arrows, it made them
appear and disappear again

Test Plan: animation for arrows works again

Reviewers: #plasma, hpereiradacosta

Reviewed By: hpereiradacosta

Differential Revision: https://phabricator.kde.org/D3248

kstyle/breezestyle.cpp

@@ -6650,7 +6650,7 @@ namespace Breeze
         if( widget ) widgetMouseOver = widget->underMouse();
         #if QT_VERSION >= 0x050000
         // in case this QStyle is used by QQuickControls QStyle wrapper
-        if( option->styleObject ) widgetMouseOver = option->styleObject->property("hover").toBool();
+        else if( option->styleObject ) widgetMouseOver = option->styleObject->property("hover").toBool();
         #endif
 
         // check enabled state