made appbase compile standalone

src/widgets/helper/SignalLabel.cpp

@@ -1,41 +0,0 @@
-#include "widgets/helper/SignalLabel.hpp"
-
-namespace chatterino {
-
-SignalLabel::SignalLabel(QWidget *parent, Qt::WindowFlags f)
-    : QLabel(parent, f)
-{
-}
-
-void SignalLabel::mouseDoubleClickEvent(QMouseEvent *ev)
-{
-    emit this->mouseDoubleClick(ev);
-}
-
-void SignalLabel::mousePressEvent(QMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton)
-    {
-        emit mouseDown();
-    }
-
-    event->ignore();
-}
-
-void SignalLabel::mouseReleaseEvent(QMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton)
-    {
-        emit mouseUp();
-    }
-
-    event->ignore();
-}
-
-void SignalLabel::mouseMoveEvent(QMouseEvent *event)
-{
-    emit this->mouseMove(event);
-    event->ignore();
-}
-
-}  // namespace chatterino