True age for Trello card

[Important]
This extension is now obsolete. I've created another Chrome extension called: Trello plugin all-in-one. I suggest you to install the new extension, you can find the link and introduction below:

Tired of having too many extensions for Trello? You can add Trello missing features in ONE Chrome extension: Card age, number, count and lable name
https://chrome.google.com/webstore/detail/trello-plugin-all-in-one/pnfioopglhebphfgkagefdmajgibahkk

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What is Truello

Trello has a card aging feature, but it does not show the true age of the card in a list. When you add a comment or update the card name, the card will be treated as new.
Truello can tell you how long the card has been in the list. No excuse any more!

Know issues:

1. Card age label does not show when switching boards.
2. Card age label disappears when moving cards to another list.

Just refresh the page, it will work as expected.