Add Network tests (#2304)

Also changes the way timeouts happen, since right now if a timeout was met (which it mostly wasn't), it would run the error callback twice causing potentially undefined behaviour

src/common/Common.hpp

@@ -29,6 +29,14 @@ const Qt::KeyboardModifiers showAddSplitRegions =
     Qt::ControlModifier | Qt::AltModifier;
 const Qt::KeyboardModifiers showResizeHandlesModifiers = Qt::ControlModifier;
 
+#ifndef ATTR_UNUSED
+#    ifdef Q_OS_WIN
+#        define ATTR_UNUSED
+#    else
+#        define ATTR_UNUSED __attribute__((unused))
+#    endif
+#endif
+
 static const char *ANONYMOUS_USERNAME_LABEL ATTR_UNUSED = " - anonymous - ";
 
 template <typename T>