fix: scroll to top of quest after the quest is selected (#1865)

I don't know of a better way to do this in Swing

src/main/java/com/questhelper/panel/QuestHelperPanel.java

@@ -579,6 +579,8 @@ public void addQuest(QuestHelper quest, boolean isActive)
 		questOverviewPanel.addQuest(quest, isActive);
 		questActive = true;
 
+		SwingUtilities.invokeLater(() -> scrollableContainer.getVerticalScrollBar().setValue(0));
+
 		repaint();
 		revalidate();
 	}