DownloadsTab: Refuse to start download if the game's state is not idle

rare/components/tabs/__init__.py

@@ -66,9 +66,6 @@ class TabWidget(QTabWidget):
         self.settings_tab.about.update_available_ready.connect(
             lambda: self.tabBar().setTabText(5, "(!)")
         )
-        # Signals
-        # set current index
-        # self.signals.set_main_tab_index.connect(self.setCurrentIndex)
 
         # Open game list on click on Games tab button
         self.tabBarClicked.connect(self.mouse_clicked)

rare/components/tabs/downloads/__init__.py

@@ -163,6 +163,10 @@ class DownloadsTab(QWidget):
         self.threadpool.start(worker)
 
     def __start_download(self, item: InstallQueueItemModel):
+        rgame = self.rcore.get_game(item.options.app_name)
+        if rgame.state != RareGame.State.IDLE:
+            self.__requeue_download(item)
+            return
         if item.expired:
             self.__refresh_download(item)
             return