Option to abandon game after game is completed but not fully recorded due to high server load

[bdunn313]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/bdunn313/43282bd4b8924219031fd207b6992137

• Have you checked for system updates?: [Yes/No] Yes
• Are you using the latest stable video driver available for your system? [Yes/No] Yes
• Have you verified the game files?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

Sometimes when a game is not recorded immediately due to high load, I'm presented with an "abandon" button immediately after the game ends. Usually, after waiting for a minute, it turns into "leave game" with the indicator that the game is safe to leave. However, recently I was moving quickly and I hit "abandon" even though I had already been presented with the end-of-game screen.

After logging back in a day later, I've been assessed with an abandon for a game I already completed, and am now in low priority.

Steps for reproducing this issue:

1. Complete a game
2. See that it's not recorded immediately because of high load
3. See that you have the option to abandon a game
4. Click abandon game
5. See that you are assessed with an abandon (and possibly now in low priority queue)

Expected behavior

The client is aware that stats have not been recorded yet and the game is completed, so don't give the option to accidentally abandon a completed match, or server is able to retroactively ignore "invalid" abandons when game is just recorded on a lag due to client timestamp/server timestamp drift or something.