If you complete all the quests you currently have, will you DING? The green statusbar indicates your total POTENTIAL (Projected) rewards. In other words, you have completed quests worth of 245 xp in the picture above, but you need to grind a bit more.
Track how much XP you are set to get when handing in your completed quests.
Simple configuration and feature flags.
Once you have completed enough quests, the statusbar will let you know that you will DING upon turning your quests in.