steam
In the Steam client application there is a download now icon, here it is with hover over:
and by itself:
What is this icon?
It kind of looks like this Chinese character 不 but it wouldn't really make any sense why that would be the icon for download now.
Steam creates “shortcut” applications in the Applications folder in your home folder, not the system-wide one. Unfortunately, it does not delete them when you delete a game, but you can delete them yourself; the path is /Users/[your account’s short name]/Applications, as shown in this screenshot.
Should you wish to recreate one of these, right-click on the game in Steam and choose “Create Desktop Shortcut”, then move the result from your desktop to your Applications folder. (This can be useful to restore a missing icon, though it only works sometimes for that.)
I dug through the relevant support pages and found some information for you.
Short version: Don't accept things you weren't expecting from people you don't know.
Long version:
The Steam Support page on trading and gifts says...
[...] a gift sent to your account has been revoked. The most common reasons this will occur are:
- There has been a purchase error with the game you were gifted
- The purchaser has filed a dispute over the purchase
- The gift purchase was made using a fraudulent payment method
If you believe there has been an error, please contact the person who sent this gift.
The subscription to the gifted game is no longer valid. If you wish to continue playing the game without losing any game progress, you will need to purchase the game through Steam.
Warning: Never accept a gift from someone you do not know.
Meanwhile, a few pages away...
Redeeming Fraudulent Gifts
Never accept a gift from an unknown user. Any accounts tied to a redeemed gift from a fraudulent source may be suspended.
In summary: You can either lose the game you were gifted, or possibly your account, depending on the whim of the Steam Gods handling your case. Expect the worst, because they tell you clearly in both areas don't accept things you weren't expecting from people you don't know.
Ask the person trying to gift or trade you the game to identify themselves, and reject the gift if anything seems suspicious. Better to lose a "free" game than your account, ne? If it turns out to be a friend or just someone who feels like gifting you stuff, ask them to send it through their real account, instead.
Best Answer
The intent of the button is "Move to top of queue". It's an arrow pointing up, indicating that it's moving the selected item up, and terminating at a horizontal line which indicates the top bound of the queue.