refactor: buttons and friends (#6102)

src/widgets/DraggablePopup.cpp

@@ -2,7 +2,7 @@
 
 #include "singletons/Resources.hpp"
 #include "singletons/Theme.hpp"
-#include "widgets/helper/Button.hpp"
+#include "widgets/buttons/PixmapButton.hpp"
 
 #include <QMouseEvent>
 
@@ -119,7 +119,7 @@ void DraggablePopup::togglePinned()
 }
 Button *DraggablePopup::createPinButton()
 {
-    this->pinButton_ = new Button(this);
+    this->pinButton_ = new PixmapButton(this);
     this->pinButton_->setPixmap(getTheme()->buttons.pin);
     this->pinButton_->setScaleIndependentSize(18, 18);
     this->pinButton_->setToolTip("Pin Window");