Initial work towards better dpi support

src/capture/workers/imgur/loadspinner.cpp

@@ -19,6 +19,7 @@
 #include <QPaintEvent>
 #include <QPainter>
 #include <QTimer>
+#include <QApplication>
 
 #define OFFSET 5
 
@@ -26,7 +27,8 @@ LoadSpinner::LoadSpinner(QWidget *parent) :
     QWidget(parent), m_startAngle(0),  m_span(0), m_growing(true)
 {
     setAttribute(Qt::WA_TranslucentBackground);
-    setFixedSize(100, 100);
+    const int size = QApplication::fontMetrics().height() * 8;
+    setFixedSize(size, size);
     updateFrame();
     // init timer
     m_timer =  new QTimer(this);