Quest List Tracker Resizer
Please submit bug reports and change requests through the ticketing system on this addon's Curse project page.
This addon adds a widget to the bottom right corner of the quest tracker (list of quests that displays in the main UI). The widget allows resizing the tracker from that corner of the frame.
Additionally, the tracker will automatically resize as quests are added or removed from tracking - this works regardless of the method you use to add or remove quests to the tracker.