fix(RD): prevent weird behavior of progress widget

when i.e. clicking on links or just using the downloader at all, this
prevents some flickering and the widget never getting hidden in some
cases.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/widgets/ProgressWidget.cpp

@@ -54,7 +54,10 @@ void ProgressWidget::watch(const Task* task)
     connect(m_task, &Task::progress, this, &ProgressWidget::handleTaskProgress);
     connect(m_task, &Task::destroyed, this, &ProgressWidget::taskDestroyed);
 
-    show();
+    if (m_task->isRunning())
+        show();
+    else
+        connect(m_task, &Task::started, this, &ProgressWidget::show);
 }
 
 void ProgressWidget::start(const Task* task)